Nano Machines
https://www.dwitter.net/d/22009
for(s=Date.now(Z=i=w=2e3),Y=t*=600,X=t*19%w;i--;x.fillRect(t?(X+=C(Z+=a)*2)|0:0,t?(Y+=S(Z)*2)|0:0,q=t?2:w,q))x.fillStyle=`hsl(${(a=s|i)/5},89%,${t?25:1}%`
x.globalCompositeOperation='screen'
https://www.dwitter.net/d/22009
for(s=Date.now(Z=i=w=2e3),Y=t*=600,X=t*19%w;i--;x.fillRect(t?(X+=C(Z+=a)*2)|0:0,t?(Y+=S(Z)*2)|0:0,q=t?2:w,q))x.fillStyle=`hsl(${(a=s|i)/5},89%,${t?25:1}%`
x.globalCompositeOperation='screen'