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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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ellisk1

function u(t) {

c.width=99;onclick=e=>{i=e.x/200-1,j=e.y/99-2,h=9,X=Y=30};for(k=9;k--;)x.fillRect(19+k*7+9*S(t),25,3,9);x.fillRect(X+=i,Y+=j+=.03,h/=1.05,h)

Dec 19 2018 4:17 PM UTC

}// 140/140

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#default Shooter

u/ellisk1

Click to shoot
u/ellisk1

the i and j definitions may need to be different for different browsers

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Ocramoi

function u(t) {

x.rotate(Math.abs(S(t))*360)
for(i=0;i<1080;i+=10)for(a=0;a<1920;a+=10)x.fillRect(a,i,1,1)

Dec 19 2018 12:32 AM UTC

}// 90/140

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Painting

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metamero

function u(t) {

onclick=e=>navigator.clipboard.readText().then(a=>c.before(a+' '))

Dec 19 2018 12:21 AM UTC

}// 66/140

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i know what you did last minute (click to paste text)

u/katkip

Lmao
u/joeytwiddle

#doxx

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metamero

remix of d/11474 by u/metamero

function u(t) {

eval(unescape(escape`渽挮睩摴栽㈵㘻䴽琿䴮浡瀨⡶Ⱬ⤽㹛測⵮ⴱⰭ測⵮⬱Ⱝㄬㄬ渭ㄬ渫ㅝ⹭慰⡤㴾瘫㵍嬨欫搩╹崬瘦♸⹦楬汒散琨欥測欯湼〬ㄬㄩ⤦♶帴㽶㴽㌺䵛歝⤺嬮⸮䅲牡礨礽㤼㰱㈩崮浡瀨瘽㹄慴攮湯眨潮捬楣欽牥獥琩┳⤻`.replace(/u(..)/g,"$1%")))

Dec 18 2018 7:23 PM UTC

}// 139/140

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same as before but with better rendering and big (256x144) simulation grid

u/metamero

wraparound #gameoflife features : reset on click + "random" initialization + toroidal space
u/joeytwiddle

Love the reset
u/metamero

corrected one small error and golfed/improved d/11510

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Ocramoi

function u(t) {

c.width^=1
x.font="3in'"
var a=1
for(a;a<18;a++)x.fillText('-', 100*a*Math.abs(S(t)), 600)
x.fillText('⚫', -200+100*a*Math.abs(S(t)), 640)

Dec 18 2018 3:12 AM UTC

}// 138/140

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Just my first dweet playing with the sin function

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cantelope

function u(t) {

eval(unescape(escape`挮睩摴栽ⴱ㭑㴨堬夽䌨瀩⩤⤽㹻睩瑨⡸⥬楮敔漨堬天ⱙ☦⡸子㴧扥杩湐慴栧崨獴牯步⠩⤬晩汬⡡牣⡘ⱙⰲ〬〬㜩⤩紻儨搽ㄲ㤬〩ⱱ㵓⡴⨴⤬儨搫匨瀽焼〿焺〩⩤⤬硛偝⠩㭑⡥㴱㘹ⰰ⤬儨攫匨瀽焾〿焺〩⩤⤻`.replace(/u(..)/g,"$1%")))

Dec 17 2018 11:21 PM UTC

}// 138/140

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c.width=-1;Q=(X,Y=C(p)*d)=>{with(x)lineTo(X,Y),Y&&(x[P='beginPath'](stroke()),fill(arc(X,Y,20,0,7)))};Q(d=129,0),q=S(t*4),Q(d+S(p=q<0?q:0)*d),x[P]();Q(e=169,0),Q(e+S(p=q>0?q:0)*d)

u/iverjo

#newtonscradle

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katkip

remix of d/11441 by u/jamespwilliams

function u(t) {

!t?x.translate(520,630):x.fillStyle=`hsla(${t*99},99%,50%,0.3)`;r=Math.random;x.fillRect(a=200,a,a,a);x.drawImage(c,1,1);x.rotate(3.14/3)

Dec 17 2018 6:05 AM UTC

}// 137/140

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u/metamero

nice

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jamespwilliams

function u(t) {

!t?x.translate(c.width/2,c.height/2):r=Math.random;x.fillStyle=`hsla(${r()*r()*2500},99%,50%,0.3)`;x.fillRect(a=150,a,a,a);x.rotate(0.01*t)

Dec 16 2018 9:07 PM UTC

}// 140/140

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metamero

function u(t) {

c.width=920
for(i=0;i<9;i++)
x.fillRect(i*100+S(t)*300,400,50,200)
with(document.all[0].style)overflow='scroll',border='double'

Dec 15 2018 1:55 PM UTC

}// 127/140

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shy default

u/katkip

#document

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metamero

remix of d/4109 by u/xem

function u(t) {

c.before(u)

Dec 14 2018 8:23 PM UTC

}// 11/140

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is this a quine? is this an animation? 11b

u/katkip

smart :^)