As of right now; if Euclid was dead set on having a body of his own control and creation without organizing the mass of nanobots into anything, he could but he would just be a blob of nanites with a single central consciousness without much strength and the ability to absorb matter, destroy it on a molecular level and leave it as a basic element or change the atom.
But his body would be extremely slow, it would be like a whole bunch of ants curled up together, they wouldn't work together without some order especially without a single mind, so if he wanted to have more control and versatility he would create a body.
"To build my desired body while start programming the nanites to get into a nanotube formation, where instead of a carbon atom; it will be nanites connected to each other. And just like carbon atoms they bonded well together because not only were the made with carbon but one of their commands is to group together into tubes"
Euclid first decided to put all the nanites into a sandbox so he could start putting the nanites in to patterns. With Euclids inputting another set of programming and algorithms for maneuvering the nanobots began to act and started to slowly connect into hexagon patterns, then when the nanites had formed hundreds of billions of hexagons, those shapes then started to link together into a flat sheet of hex shapes, with a length of 10 hexagons in each row.
Euclid then ordered the nano hexagon sheets to wrap into columns before they clicked together forming a complete nanotube that had the diameter of 5nm.
Unlike regular nanotubes these ones are completely controlled by Euclid like a robotic worm but was a robotic non organic material tube made up of robots instead.
This was his goal after creating the nanobots, using titanium-carbon nanites as a substitute over pure carbon would make the strength of of the nanotube far stronger than regular graphene nanotubes, and making it the new strongest material on earth not to mention that as the new material is made up of completely nanobots they could disconnect at anytime, plus anything that touched or impacted the material could start to be pulled apart at the atomic level.
And since the nanobots are robotic machines; the parts are replaceable, so if a new element is created or a material is found to be a better fit than Euclid could swap piece and improve the nanobots over time.
"Since I've built these new 'nanitetubes', I can now start building nanofibers by twisting the nanitetubes around each other, click them together again to before doing it again and forming nanitewires, then I'll begin working on forming the wires into complex parts"
As he was thinking this he started redoing the algorithms while putting the old algorithms in the nanites storage so if the nanites ever lost their place in the nanitetubes structure they could go click back into place, as he installed the new direction for the nanites to follow, the robotic tubes started to follow the instructions.
From outside the the sandbox it looked like the liquid was getting thicker as the box vibrated, if before it looked like dense reflective black oil, then it slowly changed to look like quick sand; like if you fell on to it and started struggling then you might sink faster but if you just spread your body weight out and layed on top of it you'd hardly sink at all.
Then that sand began to change to look like steel wool that's used on cast iron until it started to straighten out, which if anyone saw they would have thought it was a millions of thinner versions of a horse hair worm; but these were actually the size of a hair and looked like it too, they had a shiny black metallic color while looking like a hair, until they finally straightened completely into thin wires.
"Now I'm ready to start forming my body and by the time I complete the skeleton the stomach will be ready for the reacter, I should be ready to implement the duel fusion reacter blueprint and the nanites will start forming the reactor according the design as the body is being completed, anyway since I already have the design prepared the body should only take a couple minutes"
As Euclid had been building and running simulations on the the power source he was going implement into his mechanical, he started focusing on his body's design, and with biology and physics at the highest levels he planned for each muscle,( even if they were all machines) to model after the human body he was modeling his body after humans, so he wanted it resemble the human physique and to perform at the highest efficiency so he had not only simulated the human body but also looked for possible improvements that he could implement in his body
Like the spine, the human spine was designed to be be hunched like for quadriped but changed after we started standing straight, so Euclid designed his to be able to contort in any direction and even enable the transfer of more power, while the most efficiency gained in moving his spine, while other parts of the body was also improved like the core muscles, legs, hips, shoulders, arms and the muscles around those areas were also resigned them to be stronger, more efficient while being able to generate more power in the force that those areas can exhibit.
As Euclid finished his thoughts he started the next movement instructions algorithm and the some of the nanitewires to began to move towards each other before they started waping around each other like in a pit of snakes, while they appeared to be melting into each and molding into shapes of that looked like smooth black that reflected like glass.
The first bones to be noticed were the hands, as the robotic skeleton was being created with it's back on the ground most of all the skeleton was being created at the same time, but the hands and fingers were the first to be recognized as the bones and the connecting joints between the bones formed in the hands and connected to the already growing the bones in the forearms which was also already starting to be connected to the humerus with more nanitewires which was acting like Ligaments.
As the arms and shoulders were being formed so was the spinal cord, with the vertebra being formed formed first then the intervertebral following a couple seconds later followed by the ribs starting to grow from the where the insertion spine untilthey grew around 3-6 inches until the ribs on both sides met together and started forming the sternum.
But Euclid decided to add more ribs to cover his stomach which would add more protection to the reactor, which would generally be impossible for humans because of the gender of a fetus is still undecided some time after conception, the body will still grow parts of the body that would generally be needed or would be in the way in the future, like no rib cage over the stomach because if the fetus is female then the ribs would interfere with a possible pregnancy, it's the same reason for males having nipples.
As the spine, improved rib cage, and sternum was completed they began to be connected to the pelvis and femur with more nanitewires, and with the leg bones already being completed and connected to the femur, the only part remaining of the metallic skeleton was the skull.
The skull was actually the fastest part as the nanitewires just started fusing together into a chunk forming the thickest nanite bone structure as it was completely nanitesteel which was just fused nanitewires, and not only was the skull nanitesteel; but every newly created bone was nanitesteel.
"As nanotubes are already the strongest material on the planet even surpassing diamond, and my nanitetubes, nanitewires, and furthermore, nanitesteel has farout reached diamond, this body is the strongest thing on the planet, and that's just the bones added next is the fiber or skin, eyes, lungs and the duel fusion reactor. So let start with the lungs then the eye then we'll work from there."
And starting with the lungs; he gave the other nanowires more instructions and movement algorithms on how to construct the lungs, causing the hair sized wires to start moving towards the open skeleton, and into the rib cage before starting to stitch together into a fabric that started to slowly blow up two balloon like structures that began to thicken as well, while creating the lungs; an airway pipe was being connected from the two lung structures to the robotic jaw where a human would usually breathe from
But instead of breathing in oxygen, Euclid would absorb H2O, while absorbing it the molecule would be broken in to 3 parts, 2 hydrogen atoms and 1 oxygen atom then that oxygen atom will be looted for 3 neutrons and I will add them to the hydrogen atoms creating deuterium and tritium, then he would put the two hydrogen isotopes into their respective lung or was more like a storage device, while expelling the scraped oxygen like humans expell CO2.
While the lungs were being finished the skull was being updated, the nanitewires were being fused but they also changed their structure to be more crystal like; still black but appeared glossy, the artificial tongue was also being built even though he could just use a voice box; he liked the idea of having one and it would make him more human.
The only reason he was going out of his way to disguising as a human in the first place was so he wouldn't bring any trouble to himself; as an advanced artificial intelligence or robot of any kind would either sprout worry, fear, greed, suspicion, or other such emotions and would be more trouble than it was worth, and although he could just wipe out the rest of humanity as it would be quite easy with a biological virus or even his own nanites, it would be being alone on the planet until I leave the planet and find new life or investigate that tower that I heard about.
As the skull and surrounding parts were being completed, the reactor has also been completed.
"Now that the dual fusion reactor, I can input the new commands to the nanites but I won't be able to start the reactor until the artificial skin is completed, if I did start the up reactor before the reactor was contained any excess heat would burn this facility the ground only leaving my skeleton, literally and figuratively, as my consciousness is inside a computer on the otherside of the building; that computer would be completely destroyed along with the facility meaning my consciousness as well leaving only my skeleton as it could withstand the heat and start using the heat for extra power. So I better build the reactor then the skin before I start"
Finishing his thoughts he gave the nanites their next and most important job as well as the blueprint for the reactors design, as the nanites got their instructions they began moving into the belly that also covered in metal ribs before starting to build two two donuts before before becoming a cylinders,this was the most advanced tokamak fusion reactor ever created and to be this compact
In a tokamak, magnetic field coils confine plasma particles to allow the plasma to achieve the conditions necessary for fusion, the only problem humans had with this type of reactor was how to keep the core of plasma hot enough that fusion can occur while preventing the tokamak walls from melting from that heat but Euclid didn't have this problem as not only around his nanites heat resistant, but also used that excess heat as more energy.
Since the reactor was generating a massive amount of energy, even more than he would need; the reactor wouldn't be on all the time and he would be fine only turning it on a couple times a week and that along with the excess heat would give his body and consciousness more than enough energy.
And the reason for the building two reactor was just in case one was destroyed or could not provide power at that time or for some reason he needed more power he could start of both at the same time.
As the generators was being built, the rest of the of the nanitewires were starting to fuse together into a leather like texture, it began to be wapped around the bones about an half an inch thick, forming a black metallic skin.
First the back, thighs, underarms, throat, and head all started gaining skin before the the nanites skin started continuing to climb up the metallic bones before reaching the chest, face, shins, shoulders and the rest of the body until both sides connected in the middle of the body completing the black metallic skin across the entire body.
"Now that the body is completed and the reactors are contained, I'll then transfer my programming and consciousness after this, now let's start the reactor"
And just as Euclid finished is thoughts, he connected the facilitys power system to his new body to jump start his reactor. Then he activated the program to start his new reactor.
Vvvrrrrooooommmm !!!
And the reactor started!