# \[issue\] Hi can't find the problem in my code . I am new thanks
**URL:** https://discourse.processing.org/t/issue-hi-cant-find-the-problem-in-my-code-i-am-new-thanks/27099
**Category:** Beginners
**Created:** [January 15, 2021, 6:05pm UTC](https://discourse.processing.org/t/issue-hi-cant-find-the-problem-in-my-code-i-am-new-thanks/27099 "2021-01-15T18:05:52Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@brono](https://discourse.processing.org/u/brono)
#### Post date: [January 15, 2021, 6:05pm UTC](https://discourse.processing.org/t/issue-hi-cant-find-the-problem-in-my-code-i-am-new-thanks/27099/1 "2021-01-15T18:05:52Z")
I was following The coding train video 7.4. link::
**\> [https://www.youtube.com/watch?v=fBqaA7zRO58&list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA&index=29&ab\_channel=TheCodingTrain](https://www.youtube.com/watch?v=fBqaA7zRO58&list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA&index=29&ab_channel=TheCodingTrain)**
and I can’t find the problem I am facing. it says Uncaught TypeError: Cannot read property ‘move’ of undefined (sketch: line 24).
Here is my code
```auto
let bubble = [];
function setup() {
createCanvas(600, 400);
}
function mousePressed() {
let r = random(10, 50);
let b = new Bubble(mouseX, mouseY, r);
bubble[0] = b;
}
function draw() {
background(140, 140, 20);
for (i = 0; i <= bubble.length; i++) {
bubble[i].move();
bubble[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(1);
fill(15, 94, 156);
ellipse(this.x, this.y, this.r);
}
}
```
---
### Author:  [@GoToLoop](https://discourse.processing.org/u/GoToLoop)
#### Post date: [January 15, 2021, 6:13pm UTC](https://discourse.processing.org/t/issue-hi-cant-find-the-problem-in-my-code-i-am-new-thanks/27099/2 "2021-01-15T18:13:44Z")
>