Dweets awesomed by u/0c370t

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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nicno90

function u(t) {

f=t/5-36
x.fillStyle=R(10,200,10,1)
a=(1+.9*C(8*f))*(1+0.1*C(24*f))*(0.9+0.5*C(200*f))*(1+S(f))*200
x.fillRect(a*C(f)+960,-a*S(f)+980,15,15)

Jan 1 2018 5:05 AM UTC

}// 140/140

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The Cannabis Code

u/j1pster

If you save "200" in a variable you can shave off those 3 extra characters.

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jonathan_b

remix of d/5066 by u/jonathan_b

function u(t) {

for(c.width|=s=490,q=T(t/9),r=s*2,i=s*9;i>0;)for(j=9;--j;)x.fillStyle=R(s/T(q-i),j*25,i/9,1),x.fillRect(r+s*r*q/i*T(q-i-j),s+s*S(i--),25,25)

Jan 1 2018 2:08 AM UTC

}// 140/140

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u/lionleaf

Oh wow! That looks amazing

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0c370t

function u(t) {

c.width|=0;for(i=0;i<60;i++){x.fillStyle=R(S(i*t/9)*255,C(t*i/9)*255,99,1);x.fillRect(C(i*t/50)*C(t)*500+960,S(i*t/50)*S(t)*500+540,10,10);}

Jan 1 2018 1:58 AM UTC

}// 140/140

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Round and Round she goes

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ionre

function u(t) {

c.width^=0
for(i=0;i++<70;){x.beginPath()
x.fillStyle=R(40,150,0,i/70)
a=100+12*i
b=i*(t+9)/32
x.arc(960+a*C(b),540+a*S(b),30,0,7)
x.fill()}

Jan 1 2018 1:53 AM UTC

}// 140/140

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u/iverjo

#spiral #dots

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0c370t

function u(t) {

c.width|=0;for(i=0;i<256;i++){x.fillStyle=R(i*t%256,i*t%128,200);x.fillRect(960+T(t+i)*500,C(t+i)*2*i+540,40,15);}

Jan 1 2018 12:36 AM UTC

}// 114/140

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Dweet attempt 1

u/lionleaf

I like it

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ellisk1

remix of d/5048 by u/ellisk1

function u(t) {

c.width|=0;for(i=200;i--;){w=(110-i/2)**2;q=5*t+i*C(i);x.fillStyle=R(0,0,0,1+.4*C(q));x.fillRect(1e3+w*S(q)/30+S(t+i/9)*20,5*i,9+9*C(i),25)}

Jan 1 2018 12:15 AM UTC

}// 140/140

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u/joeytwiddle

Tornado!

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BackendForth

function u(t) {

c.width=1920;
for(i=-594;i<23;i++)
{
q=99*(i+t*3)
r=Math.pow(1.4,i+t*3)
x.fillRect(q,(i%2)?500+r:500-r,59,199)
}
x.stroke()

Dec 31 2017 11:28 PM UTC

}// 123/140

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u/lionleaf

A zipper?

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Flopster

function u(t) {

c.width|=0
s=1000
for(i=0;i<s;d=2*Math.PI/s*i,r=Math.max(0,S(t*(1+t*i*Math.PI/s)/5))*500,x.fillRect(r*C(d)+960,r*S(d)+540,10,10),i++);

Dec 28 2017 9:41 AM UTC

}// 134/140

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lurifax

remix of d/3221 by u/lurifax

function u(t) {

c.width|=0;for(j=361;--j;x.fillRect(960+500*S(d=j/56)*C(e=t+j%4*.785),540+500*C(d)*S(e),9,9))x.fillStyle=`hsl(${j},99%,50%`

Oct 3 2017 8:16 PM UTC

}// 123/140

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Fixed the annoying black dot in the original and golfed 17b :)

u/Xen

you can get it to 115b ;-)
u/lurifax

Oh, interesting! Hmm, can you give a hint Xen? :)
u/lurifax

Got in down to 116b, thanks for the encouragement Xen: for(c.width|=j=360;--j;x.fillRect(960+500*S(d=j/54)*C(e=t+j%3),540+500*C(d)*S(e),9,9))x.fillStyle=hsl(${j},99%,50%
u/lurifax

Still can't find the last byte though :)
u/joeytwiddle

Could j start off with a higher value? ;)

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xem

function u(t) {

x.clearRect(0,0,9999,9999);x.font="900px arial";x.fillText(String.fromCodePoint(0x1f300+~~(t*10)),400,800)

Feb 20 2017 8:48 PM UTC

}// 106/140

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More info and demos: https://github.com/xem/miniUnicode

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