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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katkip

function u(t) {

r=Math.random;for(k=999;k--;)X=r()*1920,Y=r()*1080,x.fillStyle=`hsl(${X+Y*C(Y/250+t)} 99%${C(Y/99+t*3)*X/25+50}%)`,x.fillRect(X,Y,20,20)

Feb 5 2019 10:21 AM UTC

}// 136/140

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#color

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23_Skidoo

remix of d/12189 by u/23_Skidoo

function u(t) {

t/=8
for(s=24,d=360,i=4e3;i--;f=C(X/d+t)+S(Y/d+t),x.fillStyle=`hsla(${S(f+t)*d},66%,${45+S(f*81+t*9)*s}%`)x.fillRect(X=i%81*s,Y=i/81*s,s,s)

Feb 6 2019 4:32 AM UTC

}// 139/140

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joeytwiddle

function u(t) {

for(c.width|=i=999;i--;)a=i-t,h=i/580-.25,r=(h<1.2)*150+(h>0&&h<1)*400*S(h*3),x.fillStyle='#e'+i,x.fillRect(960+r*S(a),50+i+r*C(a)/5,70,30)

Feb 4 2019 3:17 PM UTC

}// 139/140

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Gong xi fa chai!

u/katkip

#cute
u/joeytwiddle

Happy Chinese New Year of the Pig!

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katkip

remix of d/12201 by u/katkip

function u(t) {

c.width^=0;t||(n="0.");n+=""+frame.toString(2);x.font='9cm"';x.fillText(n,99-t*t*990,590)

Feb 6 2019 10:56 AM UTC

}// 89/140

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The Binary Champernowne Constant Digits Explorer #sequence #math

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katkip

function u(t) {

c.width^=0;t||(n="0.");n+=""+frame;x.font='9cm"';x.fillText(n,99-t*t*50,590)

Feb 6 2019 10:55 AM UTC

}// 76/140

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The Champernowne Constant Digits Explorer #sequence #math

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Xen

remix of d/12231 by u/Xen

function u(t) {

for(c.width|=i=1e3;i--;x.rotate(C(i^t)/199))x.fillRect(i*(5+C(t))+S(t)*99,-99+C(i*t%1)*49,5,2e3)

Feb 8 2019 12:09 AM UTC

}// 96/140

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Xen

function u(t) {

c.width=1920 // clear tha canvas
for(i=299;i--;)
x.fillRect(-99+i*(19+C(t)*9)+S(t)*200,400,5,200) // draw 50x200 recticals!

Feb 7 2019 11:55 PM UTC

}// 123/140

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#default #standard ! !

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katkip

function u(t) {

c.width=1920 // clear the canvas
for(i=9;i--;)for(j=50;j--;)x.fillRect(400+i*100+S(t)*300+j,400+C(j/22+.57+i*3.14)*30,2,200)

Feb 6 2019 9:01 AM UTC

}// 124/140

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#default

u/katkip

Forgot about the first line

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digi_bytes

remix of d/12214 by u/digi_bytes

function u(t) {

for(i=99;i--;x.fillStyle=R(i * S(t),T(t)*i,i*t))
x.fillRect(i**2 * C(i*t) + 900,i**2 * S(i**t) + 500,i * 3*S(t),i * 3*S(t));

Feb 6 2019 8:36 PM UTC

}// 125/140

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This one feels a bit more "splatterful".

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robbyg

remix of d/12143 by u/katkip

function u(t) {

c.width^=0;for(i=192;i--;)for(j=9;j--;x.fillStyle=`hsl(${h},50%,50%)`)x.fillRect(i*10,h=540-(S(t*2+i*3.12)*C(t+i+j/9)*j/4)*100,10,10)

Feb 4 2019 8:20 PM UTC

}// 133/140

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u/23_Skidoo

x.fillStyle="#fff3";x.fillRect(0,0,c.width,c.height);for(i=192;i--;)for(j=9;j--;x.fillStyle=hsl(${h},50%,50%))x.fillRect(i*10,h=540-(S(t*2+i*3.12)*C(t+i+j/9)*j/4)*100,10,10)
u/23_Skidoo

Or, replace c.width^=0 with x.fillStyle="#fff3";x.fillRect(0,0,c.width,c.height);