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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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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hollo47

function u(t) {

c.width=g=999;for(i=-70;40>i;i++)for(j=1;80>j;j++)f=500*i,h=j-t%1,l(),f+=500,l();function l(){x.lineTo(500+f/h,(g+270*S(7*f))/h)}x.stroke();

Apr 24 2018 2:03 PM UTC

}// 140/140

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Further learning perspective. Landscape experiment!

u/joeytwiddle

That's cool! #landscape #perspective
u/jylikangas

Nice! There are some golfing opportunities. 124 byte version...for(c.width=g=999,i=-70;40>i++;)for(j=80;--j;l(f+=500))(l=e=>x.lineTo(500+f/h,(g+270*S(7*f))/h))(f=500*i,h=j-t%1) x.stroke()

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New_Core

function u(t) {

for(w=c.width|=i=9;i--;)Z=w/(i*3+20*C(t)+40),x.fillRect(960-Z/2+Z*S(t/5)*15,400-Z*2,Z,Z*6)

Apr 24 2018 11:39 AM UTC

}// 90/140

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u/joeytwiddle

#default #perspective #hashtag_mania
u/lionleaf

Love the default remixes!
u/13thptr

#d3

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Agnes

remix of d/7763 by u/Agnes

function u(t) {

A=a=>Math.random()*a;q=i=0;B=t?B.map(a=>x.fillRect(960+(h=300+A(i++))*S(m=t/10-a+A(a-q)),540+h*C(m+!(q=a)),r=5/i,r)|m):[];i<99?B.push(t/8):0

Apr 24 2018 10:56 AM UTC

}// 140/140

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Rings of dust II: smaller particles

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Agnes

function u(t) {

A=a=>Math.random()*a;q=i=0;B=t?B.map(a=>x.fillRect(960+(h=300+A(i++))*S(m=t/10-a+A(a-q)),540+h*C(m+(!(q=a))),3,3)|m):[];i<99?B.push(t/8):0;

Apr 24 2018 10:31 AM UTC

}// 139/140

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Rings of dust

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sirjofri

function u(t) {

w=c.width=1920;for(j=(h=c.height)/(n=8);j<h;j+=h/n)for(i=0;i<w;i+=5)x.fillRect(i,j+j/10-60+S(t*j/50)*10+S(t*j/300+i)*(h/n/2-10+j/30),5,5)//s

Apr 23 2018 11:19 PM UTC

}// 140/140

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notice the comment to reach 140 chars

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sirjofri

function u(t) {

w=c.width=1920;for(j=100;j<(h=c.height);j+=h/6)for(i=0;i<w/10;i++)x.fillRect(i*w/10,j+20*S(t*5+5*i)+10,w/10+C(i+j)*50,S(t*2+w/10*i+j*3)*100)

Apr 23 2018 9:27 PM UTC

}// 140/140

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firegodjr

function u(t) {

c.width=120
for(i=0;i<120;i++)for(j=0;j<67;++j)
x.fillStyle=R(S(t+i*j/19)*255, S(t+i*j/19+2)*255, S(t+i*j/19-2)*255),x.fillRect(i,j,1,1);

Apr 23 2018 6:05 PM UTC

}// 137/140

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Hey did you guys ever stare directly into a CRT tv? Well now you don't have to!

u/firegodjr

#trippy #rgb #bad_for_your_eyesight_probably

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jonikorpi

function u(t) {

for(c.width|=i=0;i++<64;x.font=`bold ${5*(i+90)}px e`,x.fillText("Ben",f=600+(i-20)*2*S(t),f+200))x.fillStyle=R(i*S(t)*4,i*C(t)*4,i*T(t)*4)

Apr 23 2018 2:18 PM UTC

}// 139/140

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this is dumb please ignore

u/BalintCsala

You can edit a dweet and press remix when you change someone else's
u/jonikorpi

Yeah thanks, couldn't find the feature since it's not visible before you edit :)
u/lionleaf

#text

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Agnes

remix of d/7651 by u/Agnes

function u(t) {

for(c.width|=i=0;i++<100;f=i/50,x.fillStyle=R(128*f,255*(i>99)),x.font=24+3*i+"px A",x.fillText("Neat #2",200*(3-f*S(t)),740-200*f*C(t/8)));

Apr 23 2018 11:37 AM UTC

}// 140/140

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Neat text #2: Neater Still

u/Agnes

Done better by u/aemkei as a remix to the original; check it out!
u/DirtyDan

Neat.
u/joeytwiddle

#text

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prplz

function u(t) {

t?z=150:c.width=300;for(i=10;i--;x.fillStyle=R(r=S(t*.7)*100+100,0,r*1.5))x.fillRect(z+S(t+i*C(t))*z,z+C(t+i*S(t))*z,32,32)

Apr 23 2018 11:12 AM UTC

}// 123/140

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u/BalintCsala

Well... that's definitely purple
u/BalintCsala

#purple