为什么这段代码行不通。我在库p5中使用javascript

因此，我一直在观看编码培训，学习使用javascript进行编码，我试图复制他的代码，但无法正常工作。我正在用括号。这是情节：

https://www.youtube.com/watch?v=fBqaA7zRO58&t=0s&list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA&index=26

let bubbles = []

function setup() {
    createCanvas(600,400) 
    for (let i = 0; i < 3; i++) {
        let x = 10 + 30 * i
        bubbles[i] = new Bubble(x, 200, 40);
    }
}

function draw() {
    background(0);
    for(let i = 0; i < bubbles.lenght; i++) {
        bubbles[i].move;
        bubbles[i].show;
    }
}

class Bubble {
    constructor(x,y,r) {
        this.x=x;
        this.y=y;
        this.r=r;
    }
    move() {
        this.x = this.x + random(-5,5);
        this.y = this.y + random(-5,5);
    }
    show() {
        stroke(255);
        strokeWeight(4);
        noFill();
        ellipse(this.x, this.y, this.r * 2);
    }
}