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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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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bencoveney

function u(t) {

for(x.drawImage(c,0,1),i=0;i<999;i++,x.fillStyle=`hsl(${S(t)*i},70%,50%`,x.fillRect(i*2,0,2,1));

Nov 2 2019 1:54 PM UTC

}// 96/140

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learning some better minification techniques

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katkip

remix of d/16446 by u/katkip

function u(t) {

c.width*=1;for(i=45;i-->-45;)for(j=45;j-->-45;)x.fillStyle=`hsl(${f(i,j)} 99%50%)`,x.fillRect(900+i*10+S(t)*20+j*3,500+j*4-f(i,j),10,10)

Nov 2 2019 9:32 AM UTC

}// 136/140

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f=(X,Y)=>S(X/9+t*9)*C(Y/9+t*9)*40+40/i/j*20 3d plotter

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kira

remix of d/16421 by u/kira

function u(t) {

for(i=5508;--i;x.fillRect(920+S(m*m)*i,90+C(m*m)*q,10,990))m=i/i*t,q=3e5/i,x.fillStyle=R(i/i/299,i*i*12290)

Nov 1 2019 5:32 PM UTC

}// 108/140

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katkip

function u(t) {

eval(localStorage.Y)//ꑶ㺡땩삔徫醋鿏뉈ꑍ奉奋ꐽ䚋䁴䡐띃ꊨ삈嫙咐䍳㻩䦩奉䇗䠒垩䇒垰䔙嫕兰䎃㻩䦩奉䇗䠒垩䇒垰䔱嬉䔸嫐䔹嫐썹쎋鿏뉈뻀ꑾ㉤䂋궭鲛뻽岨䡆ꑼꤓ떹ꤥ徰ꋳ꣨㢻궞넍㈹夵匀㧹阻뮮鿉꤬肅鬤㻯䠸䔯䠹䓹䓹䁋궞覫徿䡘䔯䠹䍭궞봼궞뮫従㻯䠹䦣夹䦩奋궞봻徣㻯䠸䦣夹䦩妍

Nov 1 2019 2:18 PM UTC

}// 136/140

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If this doesn't work, view d/16213

u/katkip

#chaos

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BOOSH

remix of d/16375 by u/katkip

function u(t) {

for(i=3e3;i--;)x.fillStyle=R(z=100+C(i*2.4+t*26)*100,i,z*S(t+c)),x.beginPath(),x.ellipse(930+S(i*2+3)*i,540+C(i*2+t)*i,19,59,t,0,8),x.fill()

Oct 30 2019 10:15 AM UTC

}// 140/140

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trashdotbin

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katkip

function u(t) {

for(i=2e3;i--;)x.fillStyle=R(z=100+C(i*2.3+t*39)*100,z,z*S(t+i)),x.beginPath(),x.ellipse(960+S(i*2+t)*i,540+C(i*2+t)*i,19,49,t,0,7),x.fill()

Oct 29 2019 6:41 PM UTC

}// 140/140

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Bee spiral

u/Xen

smooooth

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metamero

function u(t) {

for(i=999;--i;i&1&&x.fillRect(z*(i%23),z*(i/23|0),z,z))z=90

Oct 29 2019 3:37 PM UTC

}// 59/140

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59B checkered pattern ! new ultra-golf challenge ! rules proposed on discord

u/New_Core

I didnt read the rules but here is a 48B for(i=166;i--;)x.fillRect(i%24*90,i%14*90,90,90)
u/pavel

Would be good to put the rules here... Can the scale be not 90? Seems like a bad number. 120 fits nicely horizontally and vertically, I'd choose that. Or a power of two for possible bit twiddling.
u/metamero

rules of this one: - full render on first/each frame - full resolution - exact 12 squares on vertical

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bencoveney

function u(t) {

x.fillStyle=R(0,0,0,.02)
b=2e3
x.fillRect(0,0,b,b)
x.fillStyle=R(0,b)
x.fillRect(t*Math.random()*b%b,t*b%b,30,30)

Oct 28 2019 12:54 PM UTC

}// 113/140

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taupelink

remix of d/16324 by u/taupelink

function u(t) {

t||(d=0,e=0);r=Math.random()*256|0;x.fillStyle='#'+'F50FF46F0'.substr(r%7,3);[d,e]=[e*.3+C(r)*.7,d*d*.2+S(r)*.8];x.fillRect(d*2e3,e*1e3,r,r)

Oct 28 2019 1:19 AM UTC

}// 140/140

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d/16346

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Xen

remix of d/16336 by u/username

function u(t) {

for(c.width|=j=9;j--;)for(a=j**t%t/j,i=-45;++i<46;x[f](0,d*.69,1e4,b))x[f=`fillRect`](d=i*j**a+960,0,b=a/j,2e3)

Oct 27 2019 9:26 PM UTC

}// 111/140

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#dubstep #remix #Xen