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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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KilledByAPixel

remix of d/15732 by u/KilledByAPixel

function u(t) {

for(j=18;j--;)for(Z=i=156;i--;x.fillRect(i%17*Z+J,i*9+J,9*j,9*j))q=S(S(i*i)*t*9)*9,J=j*4-Z+q,x.fillStyle=`hsl(${i+99*t-9*j} 79%${60-j*3+q}%`

Sep 19 2019 9:05 PM UTC

}// 140/140

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Color Spikes

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Kwantoem

function u(t) {

c.width=1920
for(i=50;i--;)for(j=20;j--;)
x.fillRect(900+S(C(t+j)+i)*(100*S(t)+S(t+j)*100), 500+C(S(t+j)+i)*(200+S(t+j)*100), 10, 10)

Sep 19 2019 3:08 PM UTC

}// 133/140

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Nova?

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darkpast100

function u(t) {

c.width=1920
for(i=0;i<20;i++)
for(j=i;j<i+1;++j)
for(k=j+i;k>=j;k--)
x.fillRect(50+(i/0.5)*40+S(t*2)*100*T(k),20*k,T(j*S(10*S(k*j))),3450)

Sep 19 2019 2:20 PM UTC

}// 140/140

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I really don't what am i even doing in this code. I'm new here.

u/darkpast100

I really don't know
u/katkip

.... welcome
u/joeytwiddle

Nice parallax though :D

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WasifBoomz

function u(t) {

c.width=t*10
z=x.fillRect(1*Math.random()*t,10*Math.random()*t,t*10,t*10)
z;
z;
z;
z;

Sep 19 2019 1:37 PM UTC

}// 86/140

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u/katkip

z is undefined. you can make a function like z=()=>x.fillRect(1*Math.random()*t,10*Math.random()*t,t*10,t*10) then call it by z()

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@no_identd

remix of d/15718 by u/@no_identd

function u(t) {

c.style.background=R();x.fillStyle=R(...[S,C,T].map(_=>256.^(_(t)%t)));a=2.3999631*frame;r=8*frame**.5;x.fillRect(r*C(a)+960,r*S(a)+540,8,8)

Sep 16 2019 7:46 AM UTC

}// 140/140

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Throwback #1

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joeytwiddle

remix of d/3247 by u/joeytwiddle

function u(t) {

x.fillStyle='#000',x.fillRect(0,0,1920,1080),X=960+1200*C(t)
x.fillStyle=R(255,X/9,0),x.beginPath(),x.arc(X,1100-600*S(t),199,0,7),x.fill()

Sep 13 2019 3:14 PM UTC

}// 139/140

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Happy Mid-Autumn Festival!

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robbyg

remix of d/15668 by u/mildlybean

function u(t) {

for(c.width=X=20;X--;)for(Y=11;Y--;)x.fillRect(X,Y,a=S(X+t-Y),C(Y+t+a))

Sep 12 2019 8:51 PM UTC

}// 71/140

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Beats me. I just thought it looked pretty.

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django

remix of d/15681 by u/django

function u(t) {

with(x){w=c.width*=1;w/=2;h=540;

for(i=0;i<90;i++){a=(S(t+i+C(t))+1)*w;b=(C(t+i)+1)*h;
fillRect(a-5,b-5,10,10)}

}

Sep 10 2019 11:06 PM UTC

}// 115/140

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procession

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django

function u(t) {

with(x){w=c.width*=1;w/=2;h=540;
beginPath();
for(i=0;i<800;i++){a=(S(t+i+(t/20)*C(t-i))+1)*w;b=(C(t+i)+1)*h;
lineTo(a-5,b-5)}
stroke();
}

Sep 10 2019 11:00 PM UTC

}// 138/140

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elasticity

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taupelink

function u(t) {

m=70;z=1e3;r={valueOf:Math.random};x.fillStyle=R(0,g=r*r*m,g,.4),x.fillRect(r*2e3-m,r*z-m,r*z,r*z);s=r>.2;x.clearRect(r*2e3,r*z,s?2:m,s?m:1)

Sep 10 2019 2:04 AM UTC

}// 140/140

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d/15672