The figure suggests that there is a ball which moves in front of two lines. One end of each line and the ball are connected to the position of the mouse. mouuse
function setup() {
var canvas = createCanvas(500, 500);
canvas.parent('sketch');
strokeWeight(2);
}
function draw() {
background(204);
if (mouseIsPressed){
fill(0);
stroke(255);
} else {
fill(255);
stroke(0);
}
line(width/5, 0, mouseX, mouseY);
line(width/1.25, 0, mouseX, mouseY);
line(width/5,height, mouseX, mouseY);
line(width/1.25, height, mouseX, mouseY);
noStroke();
ellipse(mouseX, mouseY/2, width/8, width/8)
}