Dweets by u/Knifa

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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Knifa

remix of d/6523 by u/Knifa

function u(t) {

x.fillRect(0,0,2e3,2e3);for(i=64;i--;)for(x.setTransform(1,0,0,1,i%8*240,i*135),j=99;j--;)x.clearRect(T(t+j)*10,T(t)*50,8,T(t)*5)

Jan 26 2018 4:59 PM UTC

}// 129/140

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Knifa

remix of d/6494 by u/magna

function u(t) {

x.fillRect(0,0,2e3,2e3);for(i=64;i--;)for(x.setTransform(1,0,0,1,t%8*240,(i>>3)*135),j=99;j--;)x.clearRect(120+T(t+j)*10,67+S(j*i)*50,t%8,2)

Jan 26 2018 4:55 PM UTC

}// 140/140

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Knifa

function u(t) {

_=45
c.width^=0
for(i=0;i<_;i++)for(j=0;j<_;j++){$=t+S(i/8)-C(j/4)
w=S($)**.85
x.fillStyle=R(0,T($)*255,w*255)
x.fillRect(_*i,_*j,_*w,_*w)}

Jan 23 2018 9:08 AM UTC

}// 139/140

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u/aleamb

cool
u/donbright

color + width is a nice effect

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Knifa

remix of d/6350 by u/Knifa

function u(t) {

_=48
for(i=0;i<_;i++)for(j=0;j<_;j++){r=t+(i-_/2)*(j-_/2)/_
$=S(r)
x.fillStyle=R($*255,C(r*2)*255*$,j*$*9)
x.fillRect(i*_,j*_-$*_,_*2,_*2)}

Jan 22 2018 10:43 PM UTC

}// 139/140

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u/Lazy1337

#plasma

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Knifa

function u(t) {

c.width^=0
_=96
for(i=0;i<_;i++)for(j=0;j<_;j++){r=t+i+j
$=S(r/3)*_
x.fillStyle=R(C(r/3)*255,S(r/3)*255)
x.fillRect(i*_-$/2,j*_-$/2,$,$)}

Jan 22 2018 7:23 PM UTC

}// 137/140

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Knifa

remix of d/6343 by u/Knifa

function u(t) {

c.style.background='black'
for(i=0;i<192;i++)for(j=0;j<32;j++){q=i-96;r=j-16
x.fillStyle=R(S(t*q*r/10)*255)
x.fillRect(i*8+200,j*8+360,8,8)}

Jan 22 2018 4:51 PM UTC

}// 140/140

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u/41407

Cool! Change first line to c.style.background=R(0) to get it done in 137 chars :)
u/Knifa

cheers! didn't think of that :D
u/zanella

You can reduce to 136 actually! c.style.background=R()

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Knifa

remix of d/6341 by u/Knifa

function u(t) {

for(i=0;i<64;i++)for(j=0;j<64;j++){q=i-40;r=j-40
x.fillStyle=R(S(t*q*r/99)*255,T(t*q*r/99)*255,C(t*q*j/99)*255)
x.fillRect(i*32,j*32,32,32)}

Jan 22 2018 4:45 PM UTC

}// 140/140

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Knifa

function u(t) {

for(i=0;i<64;i++)for(j=0;j<64;j++){q=i-32;r=j-16
x.fillStyle=R(S(t*q*r/99)*255,T(t*q*r/200)*255,C(t*q*r/50)*99)
x.fillRect(i*32,j*32,32,32)}

Jan 22 2018 4:30 PM UTC

}// 140/140

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Knifa

function u(t) {

c.width=2e3
d=parseInt(Date.now()/1e3)
h=R(d/2.16e5%24*10,d/3600%60*4,d%60*4)
x.font='1.5e3% sans-serif'
x.fillStyle=h
x.fillText(d,334,650)

Jan 22 2018 4:11 PM UTC

}// 140/140

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Knifa

function u(t) {

x.fillStyle=`hsla(${t*25},90%,65%,.5)`
x.fillRect(S(t*8)*c.width/2+c.width/2,c.height/2,32,2e3)
x.rotate(.1)
x.drawImage(c,0,0)

Jan 22 2018 1:21 PM UTC

}// 127/140

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