JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id='c'/>

JavaScript

p=prompt,l=p(),s=p();
c.width=c.height=y=s*l;
t=c.getContext("2d");
for(x=0;l--;x-=s)t.moveTo(0,y-=s),t.lineTo(-x,0);
t.stroke();