recursive_circle_sierpinski.pde

public void settings() {
//        size(800,600);
        fullScreen();

    }
    
    public void setup() {
        background(0);
    }

    public void draw(){
        background(0);
        noStroke();
        noFill();
        drawRecursively(round(width/2), 0, 550);
    }

    void drawRecursively(int x , int y, float radius){

        ellipseMode(CORNER);
        //rect(x-radius, y-radius, radius*2, radius*2);
        ellipse(x-radius, y-radius, radius*2, radius*2);
        float step = map(mouseX, 0, width, 0,.7f);
        if(radius>4){
            int r =100;
            int g = 100;
            int b = 100;
            stroke(r, g, b);
            drawRecursively(x, y, radius*step);
            drawRecursively(x, round(y+radius), radius*step);
            drawRecursively(round(x-radius/1f), y, radius*step);
            drawRecursively(round(x+radius/1f), y, radius*step);        }
    }