Dweets awesomed by u/ETHproductions

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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Current theme challenge: #Opposites

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cantelope

function u(t) {

for(w=(i=c.width|=0)/2,x.globalAlpha=.07;i--;x.fillRect(w+(i%7-3)/Z*w-(s=(w-C(t/3)*w)/Z)/2,540+((i/7%5|0)-2)/Z*w-s/2,s,s))Z=1+(i/35|0)-t*5%1

Nov 24 2017 4:57 AM UTC

}// 140/140

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u/joeytwiddle

Nice!

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BriSeven

function u(t) {

if(!t)d=[];c.width=1920;X=Y=0; for(i=0;i<1e4;i++) D=(d[i]||1),d[i]=D+S(D*t*i)/9, x.fillRect(X+=C(d[i])*5, Y+=S(d[i])*5, 5, 5)

Nov 23 2017 8:16 AM UTC

}// 125/140

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A mutating (pseudo)random walk.

u/magna

Awesome!
u/donbright

brilliant

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whackashoe

remix of d/3551 by u/whackashoe

function u(t) {

f=a=>[c.width^=0].concat(...a.map((v,i)=>[[t*S(i),0,0,0,0,0]][v])),f(f(f(f([0])))).map((a,i)=>x.rotate(a*S(i)/9,G=T(i))|x.fillRect(i,i,G,G))

Nov 22 2017 10:14 AM UTC

}// 140/140

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Accident in space #2

u/katkip

#tagfail

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BriSeven

remix of d/3498 by u/Xen

function u(t) {

t?x.fillStyle=R(t*9%X,t*9%Y):X=Y=255
for(i=9;i--;x.fillRect(X+i*250,Y%1e3,5,5))
X+=S(C(t)*11)/3
Y-=C(S(t)*11)*3
x.drawImage(c,C(t)/9,S(t)/9)

Nov 21 2017 4:56 AM UTC

}// 140/140

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u/Xen

nice effect

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veubeke

remix of d/3530 by u/veubeke

function u(t) {

t||x.translate(960,540)
x.rotate(t)
for(i=2e3;i--;x.rotate(P=1/310),x.fillStyle=`hsl(${t*i},50%,${S(i*10*P)*5+6|0}0%`)x.fillRect(0,0,1,2e3)

Nov 20 2017 8:06 PM UTC

}// 139/140

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u/Xen

LOVE IT

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mmastrac

remix of d/3451 by u/mmastrac

function u(t) {

f=e=>300*Math.asin(C(t*e))+480;for(e=c.width|=onmousemove=e=>A=e.y/innerHeight*1e3;e--;)x.fillRect([f(5),0,944][e]*2,e^1?f(3):A,32,e?256:30)

Nov 2 2017 10:07 PM UTC

}// 140/140

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Move the mouse over the canvas to start!

u/magna

Fix for the "A is not defined" error: Use an existing var like T instead of A: https://www.dwitter.net/d/3455
u/Cloud

Cool! :D

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p01

remix of d/3446 by u/ETHproductions

function u(t) {

c.width|=onkeydown=e=>(e=e.which-36)>0&&e<5?e&1?X+=e-2:Y+=e-3:0;x.fillRect(X*9,Y*9,60,60)};{X=Y=70

Nov 2 2017 11:57 AM UTC

}// 98/140

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Move the square with the arrow keys. You have 42 bytes to write your game around this template

u/BalintCsala

3 bytes less: https://www.dwitter.net/d/6755

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ETHproductions

function u(t) {

c.width|=onkeydown=e=>(e=e.keyCode-37)?e-1?e-2?e-3||Y++:X++:Y--:X--;x.fillRect(X*9,Y*9,60,60)};{X=Y=70
// game template. arrow keys to move

Nov 2 2017 1:53 AM UTC

}// 139/140

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Very rudimentary game template. Not sure how much more anyone can do with <40 bytes, but you never know ;)

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mmastrac

function u(t) {

t?0:M=[];for(f=w=62,i=500;i--;)M[i]=x.fillRect(w*(i>>4),w*(i%16),w,w,x.fillStyle=R(e=M[i]))||t?f&&e>(z=M[i+1])?(M[f--,i+1]=e,z):e:i**6%256

Oct 30 2017 6:10 PM UTC

}// 138/140

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Bubble sort visualizer

u/sigveseb

really nice
u/lionleaf

Brilliant
u/katkip

Awesome

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sniok

function u(t) {

c.width=400;l=20;f=30;for(j=l;j--;)for(i=f;i--;x.fillStyle=R(i*l,j*l,S(t)*255),x.fillRect(S(t/2+5*j)*2+i*l-l,j*l+S(t*2+5*i/l)*l-40,f,f)){}//

Oct 27 2017 6:06 PM UTC

}// 140/140

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u/joeytwiddle

#colors

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