# Unexpected code behaviour: nested loops vs manual

**URL:** <https://discourse.processing.org/t/unexpected-code-behaviour-nested-loops-vs-manual/26266>\
**Category:** Coding Questions\
**Created:** [December 15, 2020, 11:56am UTC](https://discourse.processing.org/t/unexpected-code-behaviour-nested-loops-vs-manual/26266 "2020-12-15T11:56:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Chudroy](https://avatars.discourse-cdn.com/v4/letter/c/e47774/32.png) [@Chudroy](https://discourse.processing.org/u/Chudroy)\
**Post date:** [December 15, 2020, 11:56am UTC](https://discourse.processing.org/t/unexpected-code-behaviour-nested-loops-vs-manual/26266/1 "2020-12-15T11:56:57Z")

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Hi guys, new to the forum here, let me know if I’m doing anything obviously wrong.

I made this sketch:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/9/9d58f530137f598e9a669c8ad594245ce1937ecd.png)

My question is: why does the nested loop variation have a cross going through the middle? When I manually draw in the circles, there’s no cross.

Thank you beforehand for any help.

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**Author:** ![tabreturn](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/tabreturn/32/3697_2.png) [@tabreturn](https://discourse.processing.org/u/tabreturn)\
**Post date:** [December 15, 2020, 12:03pm UTC](https://discourse.processing.org/t/unexpected-code-behaviour-nested-loops-vs-manual/26266/2 "2020-12-15T12:03:34Z")

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Hi, @Chudroy

You’re seeing ‘flattened’ ellipses. Don’t begin your loop at zero –

```javascript
  ...
  for (i=100; i<400; i+=100){
    for(j=100; j<400; j+=100){
      ellipse(400,400,i,j)
    }
  }
  ...

```

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<div class="post-metadata">

**Author:** ![Chudroy](https://avatars.discourse-cdn.com/v4/letter/c/e47774/32.png) [@Chudroy](https://discourse.processing.org/u/Chudroy)\
**Post date:** [December 15, 2020, 12:10pm UTC](https://discourse.processing.org/t/unexpected-code-behaviour-nested-loops-vs-manual/26266/3 "2020-12-15T12:10:06Z")

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🤦‍♂️ of course! thank you very much