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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.

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Current theme challenge: #Food

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f8f82804

remix of d/9561 by u/f8f82804

function u(t) {

p=a=>127-C(a)*127;x.fillStyle=R(p(t),p(t-2),p(t+2));x.setTransform(1,0,0,1,960,540),x.rotate(t),x.fillRect(99,0,(t+1.05)%2.1<.02?500:250,16)

Aug 31 2018 4:35 PM UTC

}// 140/140

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#color wheel

u/katkip

that's actually impressive

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f8f82804

remix of d/9591 by u/magna

function u(t) {

s=Array((S(t)+1)*9|0).join` `+Array(9).join`▮`;c.width^=0;x.font='9em x';x.scale(1,3);x.fillText(s,0,200);throw s

Aug 31 2018 4:18 PM UTC

}// 113/140

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#default

u/Purpzie

NO HECKING WAY

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magna

function u(t) {

throw Array((S(t)+1)*9|0).join` `+Array(9).join`▮`

Aug 31 2018 3:57 PM UTC

}// 50/140

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#default

Show more comments…
u/DataMeta

Heh, neat!
u/aleamb

lol! skilled
u/sigveseb

Niiiiice
u/jick

Haha incredible.
u/lionleaf

Haha! Great one! You're all are making it harder for me to potentially change the error display
u/joeytwiddle

This character looks good on Linux: ❚

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acorv

function u(t) {

for(i=0;i<800;i++)x.fillStyle=["#CCC","yellow","cyan","lime","magenta","red","blue"][f=i%10],x.fillRect(f*300-90*C(i/S(t)/999),i*1.5,300,15)

Aug 31 2018 2:14 PM UTC

}// 140/140

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Analog TV

u/micahcowan

Is this a test of the emergency broadcast system #EBS ? Or was there a similar pattern used outside the US for other purposes (such as when no programs are being broadcast)?
u/joeytwiddle

A slice of similarity: https://en.wikipedia.org/wiki/Test_Card_F
u/acorv

Inspired by this one: https://en.m.wikipedia.org/wiki/SMPTE_color_…

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yokljo

function u(t) {

c.width|=g=400
x.translate(g,g)
for(i=40;i--;)x[f="fillRect"](190,i*50+t*g%40,9,9)
for(;i++<g;x[f](30,0,7,350+(i%22)*2))x.rotate(i?1/63:t*2)

Aug 31 2018 1:32 PM UTC

}// 140/140

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I played Half Life 2 recently...

u/aleamb

lol! cool
u/joeytwiddle

#blood #saw #tribute

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yonatan

remix of d/9584 by u/yonatan

function u(t) {

for(w=c.width|=i=0;i<128;x[f](0,i++&&200+b,w,w))x.fillStyle=R(a=i**.5*24,a,a),o=i-S(t*2)*32,x[f='fillRect'](b=400+i*4,b/2,b,o<64&&o&8&&b)

Aug 31 2018 12:57 PM UTC

}// 137/140

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#d3 #default ?

u/magna

#d3fault
u/Xen

smooth style
u/aleamb

stylish and beautiful
u/donbright

bravo

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Exca

function u(t) {

for(i=0;i<5184;i++){q=i%96,w=i/96|0
y=S(q*C(t)/5+w*S(t)/6)*t*9
o=S(q/7+w/4)*t*9
x.fillStyle=R(y^o,y|o,y+o+199)
x.fillRect(q*20,w*20,20,20)}

Aug 31 2018 12:12 PM UTC

}// 139/140

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Fixed previous one. Wait for a few seconds for effect to start.

u/magna

#waitforit

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katkip

function u(t) {

c.width=500-t*40;p=0
for(i=0;i++<500;)for(j=0;j++<500;)x.fillStyle=`hsla(${p%i+p%j},99%,50%)`,x.fillRect(i-1,j-1,1,1),p++

Aug 31 2018 12:03 PM UTC

}// 121/140

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#3D #infinite #scrolling floor. may be slow on cheap pcs. on mine works perfect lol

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yonatan

remix of d/9581 by u/katkip

function u(t) {

for(w=c.width|=i=0;i++<99;x[f](0,d+b,w,w))x.fillStyle=R(a=i**.5*24,a,a),x[f='fillRect'](800+i*4*C(t),d=200+i*4*(1+S(t)/2),b=400+i*4,i&8?b:0)

Aug 31 2018 12:00 PM UTC

}// 140/140

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alien

function u(t) {

c.width=1920;for(i=0;i<301;i++){for(j=0;j<101;j++){(i^j)%j-frame%101?x.fillRect(5*i,5*j,5,5):0}}

Aug 31 2018 11:43 AM UTC

}// 96/140

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ummmm