# Can you help me create this ATM simulator app? **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** beginner, project\ **Created:** [September 18, 2023, 11:07am UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214 "2023-09-18T11:07:55Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![yihao\_wp0bze](https://avatars.discourse-cdn.com/v4/letter/y/97f17d/32.png) [@yihao\_wp0bze](https://community.thunkable.com/u/yihao_wp0bze)\ **Post date:** [September 18, 2023, 11:07am UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/1 "2023-09-18T11:07:55Z")
I want to make a ATM project but face some problems. When I type 1 and keep clicking on the Deposit Button, it should be 1,2,3… But the result is 1,3,7,15… Where did the problem come from? This is my codes: ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/b/4/b442875d631467aee02c6d33d5ec2c2323260125.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/9/2/92f25d6ae00f403025ecbd1f773628d31d0b1f6e.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/5/f/5fb4905551865d564fe2befe922f12ee4d463666.png) Do you know how to solve the problem? ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [September 18, 2023, 2:03pm UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/2 "2023-09-18T14:03:19Z")
The problem is that you are using a “change by” block when you should be using a “set” block. “Change by” means add this to the existing amount. So you are adding 1+1 to 1 to get 3. Then adding 3+1 to 3 to get 7, etc. Another option is to change by only app variable deposit. ---
**Author:** ![yihao\_wp0bze](https://avatars.discourse-cdn.com/v4/letter/y/97f17d/32.png) [@yihao\_wp0bze](https://community.thunkable.com/u/yihao_wp0bze)\ **Post date:** [September 19, 2023, 11:58am UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/3 "2023-09-19T11:58:29Z")
I have changed the codes but there is still the problems: the answer should be 1,2,3……but it shows 1,3,5…… I was confused about it.（；´д｀）ゞ ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/e/4/e45c0424a234e267068f4aa8143cd61bdc9b8b53.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/a/b/ab8f2c18a30585ea195eb4734ce626b386343c92.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/4/0/409e984a984ae6d700c17ed928fc487f6f326684.png) ---
**Author:** ![yihao\_wp0bze](https://avatars.discourse-cdn.com/v4/letter/y/97f17d/32.png) [@yihao\_wp0bze](https://community.thunkable.com/u/yihao_wp0bze)\ **Post date:** [September 19, 2023, 12:14pm UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/4 "2023-09-19T12:14:28Z")
It so strange that everything is right now but I even didn’t change any codes. The result is 1,2,3……while it was wrong just 10 minutes ago. ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/3/33bc3139355a045a87cfbc720406b33aae849bd3.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/8/c/8c2576f2683c184d91884824be11f2d291259f8d.png) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/f/6/f66c271bde2944548df469c70de17e6a413d736e.png) ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [September 19, 2023, 2:23pm UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/5 "2023-09-19T14:23:40Z")
If you are testing on a device, the Thunkable Live app doesn’t always show the current version of the project. If you are testing a web preview, then I can’t explain why it wouldn’t have worked the first time. ---
**Author:** ![yihao\_wp0bze](https://avatars.discourse-cdn.com/v4/letter/y/97f17d/32.png) [@yihao\_wp0bze](https://community.thunkable.com/u/yihao_wp0bze)\ **Post date:** [September 21, 2023, 3:05pm UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/6 "2023-09-21T15:05:53Z")
OK,thanks for your sincerely help(●’◡’●) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\ **Post date:** [December 20, 2023, 3:06pm UTC](https://community.thunkable.com/t/can-you-help-me-create-this-atm-simulator-app/2601214/7 "2023-12-20T15:06:23Z")
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