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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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tzador

function u(t) {

c.width|=0
for(o=-39;o<39;o++)for(y=-100;y<1080;y+=5)x.fillRect(o*800*y*0.001+200+S(t+y*0.01)**2*500,y-59,500*y*0.001,3)

Feb 2 2025 10:40 PM UTC

}// 120/140

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tzador

function u(t) {

o=127462;f=String.fromCodePoint;r="";for(T=0;T<676;T++)s=f(o+T/26|0)+f(o+T%26|0),x.measureText(s).width===13&&t==0?document.write(s):0

Jan 31 2025 10:31 PM UTC

}// 134/140

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All the flags in one dweet #flag #flags

u/lewdev

Is it just me seeing a blank screen?
u/tzador

Are you on Windows by any chance? tried only on mac.
u/tzador

you should see this https://storage.googleapis.com/openscreensho…
u/KilledByAPixel

unfortunatly doesnt work on windows but maybe it will in the next version of windows!
u/cantelope

works on windows 9

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rodrigo.siqueira

remix of d/33191 by u/rodrigo.siqueira

function u(t) {

for(i=5e4;i--;x.fillRect(12*X+840,77*Y+1320+S(Y)*35,(f&37)/55+S(Y)/3,t<1))X=i*i/t%195-70,Y=(11*S(i+t)+C(X/19)*S(X/4)),f=Y/(3*X/(Y+8)*Y)*800

Jan 31 2025 1:04 PM UTC

}// 139/140

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Mountain variation #2

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rodrigo.siqueira

remix of d/33180 by u/rodrigo.siqueira

function u(t) {

for(i=3e4;i--;x.fillRect(200*X-160,62*Y+425,(f&8*8)/50,t<2))X=i*i/t%11,Y=9*S(i+t)+2,f=((S(X-4))-1/(2.5+3*(X-5.6)**2%Y*Y)*999)

Jan 28 2025 7:25 PM UTC

}// 125/140

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Convergent lines

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rodrigo.siqueira

remix of d/33084 by u/rodrigo.siqueira

function u(t) {

for(i=3e4;i--;x.fillRect(200*X-160,62*Y+550,(f&8*8)/50,t<2))X=i*i/t%11,Y=9*S(i+t),f=(-50+(1+S(X-4))/(2.5+2*(X-5.6)**2%Y*Y)*999)

Jan 28 2025 2:10 PM UTC

}// 127/140

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spikes

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tzador

function u(t) {

x.fillRect(0,0,9999,9999)
x.globalAlpha=0.05
x.font="999px f"
x.fillText(["🌑","🌒","🌓","🌔","🌕","🌖","🌗","🌘"][~~t%8], 450, 920)

Jan 27 2025 9:23 PM UTC

}// 124/140

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Emoonji

u/magna

[..."🌑🌒🌓🌔🌕🌖🌗🌘"]
u/tzador

nice trick

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rodrigo.siqueira

remix of d/33090 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(i=868;i--;)for(j=13;j--;x.clearRect(960+S(k=i/138+t)*r*1.4,540+C(k*2-t)*r,4,4))r=200+15*j+C(i/23+t)*S(t)*99*C(t)

Jan 26 2025 10:18 PM UTC

}// 140/140

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Closed path rotation

u/cantelope

neat

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peetzweg

remix of d/33089 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,10e3,10e3)
for(i=480;i--;)for(j=8;j--;x.clearRect(i*9,r,10,2))r=20*j+420+C(i/2/2+t)*S(t/2)*6*C(j/1-t*1)+S(t-i/2-S(j/2-t))*99

Jan 20 2025 7:14 PM UTC

}// 139/140

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u/rodrigo.siqueira

Hello Peetzweg and welcome to Dwitter! Thanks for the remix :-)

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taupelink

remix of d/33095 by u/rodrigo.siqueira

function u(t) {

x.globalAlpha=.05;x.fillRect(0,0,k=7560,k);for(m=k;m--;x.clearRect(730+i-(19-i/10)*j,360+16*j+400*(S(j/6)*S(i/120))*S(t),4,3))j=m%20,i=m/20

Jan 20 2025 6:21 PM UTC

}// 139/140

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Variant of d/33095 with traces

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marquisdegeek

remix of d/33085 by u/marquisdegeek

function u(t) {

this.r??=1
s=10
j=1
for(n=i=0;i<32;j*=2)
(j&r)&&x.fillRect(i*s,t*600,s,s),
n|=126&1<<((r&1<<++i?4:0)|(r&j?2:0)|(r&1<<i+30?1:0))?j:0
r=n

Jan 20 2025 10:14 AM UTC

}// 135/140

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So _that's_ how to do a global! this.r??=1

u/KilledByAPixel

there are a few easier ways, the most common is to check if t is 0 to init t?0:r=1