Dweets awesomed by u/Koi

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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oddgoo

function u(t) {

c.width=1e3;l=255
for(i=470;i>S(t);i--)for(j=0;j<3;j++){x.fillStyle=R(j*l/2,l-j*l,j*l/4);x.fillRect(i*2,S((i+t*59)/30)%(S(t))*l+l+j*9,20,9)}

Mar 6 2019 9:51 PM UTC

}// 140/140

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Sour Waves

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spaceman_blanc

remix of d/12383 by u/DataMeta

function u(t) {

c.style.background=R();for(i=325;i--;)x.fillStyle=`hsla(${i},99%,50%,.02)`,k=912*S(t/i),x.fillRect(960+k*1.8*T(i^t),524+k/C(i),i/9+9,i/9+9)

Feb 19 2019 8:49 AM UTC

}// 139/140

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2001

u/geb

#background
u/spaceman_blanc

To any remixers, you can drop the "c.style.background=R();" from the start and you will have 24 chars to play with.
u/katkip

Nice
u/katkip

Not really u/spaceman, on upload, the canvas will be reseted to white
u/spaceman_blanc

yeah youre right, didnt realise that. I mean you could still do something cool with 24 chars and white back ground i guess

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rodrigo.siqueira

remix of d/12369 by u/ETHproductions

function u(t) {

c.width&=q=-6;for(x.translate(960,540);q++;x.rotate(20.106))for(i=p=99;p+i--;p*=-1){x.fillRect(C(i/2)*C(i/62)*p,S(t)*99+i*S(t/2)*4,6,4)}

Feb 16 2019 3:14 PM UTC

}// 136/140

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Star mandala

u/joeytwiddle

Pretty! #flower

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katkip

remix of d/12347 by u/katkip

function u(t) {

c.width*=1;t||(a=b=5);for(i=999;i--;)a+=S(b+C(a+i/9999)),b+=C(a+C(b+t*i)),x.fillRect(a*590-1800,b*290-300,9,9)

Feb 14 2019 6:13 PM UTC

}// 110/140

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Chaotic #attractor in motion #math (quarc in string theory)

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tomxor

function u(t) {

eval(unescape(escape`眽㤰Ⱪ㵬㵷⩷⼵ⱴ㴱⭴⩴⼱㈻景爨砮晩汬剥捴⠰ⰰⱣ⹷楤瑨㵷⨲ⱷ⨲⤻椭ⴻ砮晩汬剥捴⡘⨶ⱙ⨶ⰱ⭋ⰵ⤩堽椥眯㌬夽椯眬䘽琭椯氬䬽ㄭ䘥ㄬ䬪㴨奞堭繆⤯㈷┱⭋⨪㠬砮晩汬却祬攽恨獬⠤筩⨱㈰紬㤹┬⑻䬪㤹紥⥠`.replace(/u(..)/g,"$1%")))

Feb 14 2019 12:46 AM UTC

}// 140/140

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Trinitron #crt #scanline #fractal

u/tomxor

Finally resorted to UTF8. This is a reasonably accurate slow motion aperture grille scanline animation... Although if run very slow you will see it's not simulating 3 electron beams. t=fps (scanline) w=width (subpixels) the later must be a multiple of 3 and 5. Use X, Y and floored F to plugin your own fractal!
u/tomxor

Uncompressed: w=90,i=l=w*w/5,t=1+t*t/12; for(x.fillRect(0,0,c.width=w*2,w*2);i--;x.fillRect(X*6,Y*6,1+K,5)) X=i%w/3,Y=i/w|0,F=t-i/l,K=1-F%1,K*=(Y^X-~F)/27%1+K**8, x.fillStyle=hsl(${i*120},99%,${K*99}%)
u/sigveseb

Kick-ass!
u/C010011012

bypassing the character limit I see using unicode escapements and regex u r very clever

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username

remix of d/7702 by u/jylikangas

function u(t) {

for(c.width=i=714;i--;F(t+i/891+(i>>7)/2,-3))(F=(a,o)=>x.strokeRect(321+S(a)*290-o/(Z=C(a)+1+(t%6<3)),9+C(a*(t/6%4|0))*285/Z,o/=Z/2,o))(i,4)

Feb 11 2019 12:17 AM UTC

}// 140/140

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katkip

function u(t) {

c.width^=d=[];q=50*t|0;for(k=q;k--;)d.push((C(k*k)*3))
for(i in d.sort(g=(a,b)=>a-b))x.fillRect(1920/q*i,540+S(d[i]*d[i]+t)*300,2e3/q,999)

Feb 10 2019 3:10 PM UTC

}// 138/140

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Fluid sin, thx u/Undefined for golf help

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21medals

remix of d/12273 by u/21medals

function u(t) {

if(2>(n=frame%(i=1e3)))for(d=[];i--;)d[i]=i**9%540
for(c.width=i=999;i--;i<n&&d[i]<(q=d[i+1])&&d.splice(i,2,q,d[i]))x.fillRect(i,0,1,d[i])

Feb 10 2019 2:17 PM UTC

}// 138/140

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Slowly sorting 1000 values using insertion #sort

u/katkip

Cool

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pavel

function u(t) {

with(x)for(c.width|=j=88,scale(9,9);i=j-->>3;arc(107+3*(9-i)*S(p/2),60,6*i,A=(j%8-6||beginPath(stroke()))*11/7+p/4,A))p=S(a=5*t-i/5)+a

Feb 9 2019 11:07 PM UTC

}// 134/140

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Square dance #beesandbombs

u/katkip

#loop

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pavel

remix of d/12230 by u/pavel

function u(t) {

for(c.width|=p=2*Math.PI,x.scale(9,9),i=13;j=i--*p/6;x.arc(107+45*C(A=j-t/4+i*p/12),60+45*S(A),14,a=(t+j)%p,a));x.stroke()

Feb 8 2019 8:33 PM UTC

}// 122/140

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I like how the corners are "walking"

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