Linear
Changing a variable to create a moving line. When the line moves off the edge of the window, the variable is set to 0, which places the line back at the bottom of the screen.
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let a;
function setup() {
createCanvas(720, 400);
stroke(255);
a = height / 2;
}
function draw() {
background(51);
line(0, a, width, a);
a = a - 0.5;
if (a < 0) {
a = height;
}
}
