walker.pde

class Walker {
    int x,y;
    int r = 0;
    int b = 0;
    int g = 0;
    
    Walker() {
        x = width/2;
        y = height/2;
    };

    void walk() {
        int choice = int(random(4));
        
        if(choice == 0) {
            x = x  + 2;
            if (r < 255) { r++; } else {g--; }
        } else if (choice == 1) {
            x = x - 2;
            if (g < 255) { g++; } else {b--; }
        } else if (choice == 2) {
            y = y + 2;
            if (b < 255) { b++; } else {r--; }
        } else {
            y = y - 2;
        }

        x = constrain(x, 0, width -20);
        y = constrain(y, 0, height -20);
    }

    void display() {
      
     
        int r = int(random(255));
        int g = int(random(255));
        int b = int(random(255));
        
        ellipse(x, y, 20, 20);
        fill(r, g, b);
        noStroke();
     }
}