如何画出哥斯拉热光束的草图，而不留下光束线的痕迹？

Question

let drawing = [];
let city;

function preload() {
  city = loadImage("city.jpg");
}

function setup() {
  createCanvas(city.width, city.height);
}

function mouseDragged() {
  drawing.push({
    mouseX: mouseX,
    mouseY: mouseY,
  });
}

function draw() {
  colorMode(HSB);

  // clear previous frame
  background(city);

  if (mouseIsPressed) {
    // set line color to a range from light yellow to dark red
    // using HSB color mode with hue from 40 to 0 and saturation and brightness at 100
    stroke(random(0, 40), 100, 100);

    // draw line from top right corner to mouse y-5 and y+5
    line(width - 1, 0, mouseX, mouseY - 5);
    line(width - 1, 0, mouseX, mouseY + 5);

    line(width - 1, 0, mouseX + random(-5, 5), mouseY + random(-5, 5));

    // set fill color to random
    fill(random(0, 40), 100, 100);

    // generate a random position within a radius of 10 of the mouse position
    let x = mouseX + random(-20, 20);
    let y = mouseY + random(-20, 20);

    // draw a circle of radius 1 at the random position
    circle(x, y, 2);
  }
}

https://editor.p5js.org/106p01013/sketches/dgE9njGLj

我想用鼠标控制哥斯拉的热光束，烧毁城市作画。 然而，每次我尝试做一个油漆标记时，光束线的效果都留在画布上。

如何用喷笔效果作画而不让光束线留下痕迹？