Dwitter - javascript demos in 140 characters

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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prplz

remix of d/9441 by u/prplz

function u(t) {

let i,j,k
for(j=k=32;j--;)for(i=60;i--;x.fillRect(i*k,j*k,k,k))x.fillStyle='#'+(((i*i*.2-j)+t*k)*27&4095).toString(16)

Aug 27 2018 7:57 AM UTC

}// 118/140

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katkip

remix of d/9421 by u/katkip

function u(t) {

if(!t){l=0;r=-1}x.fillStyle=`hsl(${(r*l)%9==(l*l*r*r*t|0)%9?0:90},99%,50%)`;x.fillRect(++r*20,l*20,20,20);if(r>98){l++;r=-1}

Aug 28 2018 7:56 AM UTC

}// 124/140

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katkip

remix of d/9496 by u/katkip

function u(t) {

c.style="background:#055";c.width^=0;x.fillStyle='#fff';x.font='1cm A';for(i=0;i<500;i++)x.fillText("❄",960+C(i)*960,(T(t/9+i*i)*1080))

Aug 28 2018 6:47 AM UTC

}// 135/140

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#snow

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katkip

function u(t) {

c.style="background:black";x.fillStyle='#fff';r=Math.random;x.font='15px A'
if(!t)for(i=0;i<300;i++)x.fillText("✴✰✯"[i%2],r()*1920,r()*1080)

Aug 28 2018 6:19 AM UTC

}// 140/140

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#stars :) If I had more space... ⋆ ✢ ✥ ✦ ✧ ❂ ❉ ✱ ✲ ✴ ✵ ✶ ✷ ✸ ❇ ✹ ✺ ✻ ✼ ❈ ✮ ✡

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katkip

function u(t) {

x.fillStyle="#fea";if(!t)x.fillRect(0,0,p=2e3,p);for(i=p;i--;x.fillStyle=`hsla(${p+i%10},90%,50%)`)x.fillRect(C(i)*S(i+t)*1e3,-18+i,30,30)

Aug 24 2018 9:24 AM UTC

}// 138/140

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#beach #waves #water

u/DataMeta

This I like!

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Galaxtone

remix of d/6498 by u/yonatan

function u(t) {

eval(unescape(escape`稽⡸ⱹⱺ⤽㹸㱹㽹㩸㹺㽺㩸㭯湭潵獥浯癥㵥㴾筣⹷楤瑨㴹㤻景爨椽㈻椭ⴻ砮獴牯步剥捴⠲㤫㈳⩩ⰲ〬ㄹⰱ㤩⥸⹦楬汒散琨㌴⬲㌪椫稨攮砯㈸ⴱ〬ⴵⰵ⤬稨㈲⭥⹹⼱㜭㘬㈰ⰳ〩ⰹⰹ⥽㭴籼潮浯畳敭潶攨筸㨹ⱹ㨹紩`.replace(/u(..)/g,"$1%")))

Aug 27 2018 2:54 AM UTC

}// 140/140

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Exaggerated the eyes a bit.

u/katkip

#interactive

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f8f82804

remix of d/9456 by u/f8f82804

function u(t) {

τ=4.7124;for(a=i=200;i--;x.fillRect(960+500*S(τ*t-i/a),520+500*C(t+i/a),39,39))x.fillStyle=R(99+a*S(b=(t+i)**(S(t)/3)),a*S(b+τ),a+a*S(b-τ))

Aug 27 2018 1:44 AM UTC

}// 139/140

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atsn

remix of d/9445 by u/ai221

function u(t) {

for(i=c.width^=0;i-=3;)x.fillRect(i,S(i/3*S(t)*t/100)*100+540,3,3)

Aug 27 2018 1:26 AM UTC

}// 66/140

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Reduced to 66 characters

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trupples

function u(t) {

c.width=99
t%=4
r=Math.max(0,9*Math.log(t-1))||0
for(i=99;i--;x.fillRect(30+r*(T(i*7)%2)+t*10,50-Math.max(0,t*(3-t/2))*9+r*(T(i*3)%2),1,1));

Aug 24 2018 9:10 PM UTC

}// 140/140

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fireworks :D

u/katkip

#fireworks

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katkip

remix of d/9415 by u/f8f82804

function u(t) {

x.drawImage(c,-16,-10.2,1952,1100);x.fillStyle=`hsla(${t*25},99%,50%)`;x.font='216px a';t%1>.01||x.fillText(t|0,900,638)

Aug 25 2018 7:32 AM UTC

}// 120/140

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#counter