fake project

sketch

function setup() {
    createCanvas(300, 300);
    background(220, 10, 255);
}

function draw() {
    background(220, 10, 255)
    //inside color
    fill(30, 250, 200)
    //border color
    stroke(50, 100, 255)
    ellipse(mouseX, mouseY, 50, 50)
}