text: class Cannon {
      constructor(x, y, width, height, angle) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
        this.angle = angle;
      }
      display() {
        
        fill("grey");
        push();
        translate(this.x, this.y);
        rotate(this.angle);
        rect(-10, -20, this.width, this.height);
        pop();
        arc(this.x - 30, this.y + 90, 140, 200, PI, TWO_PI);
        
      }
    }