Maybe due to one of the following reasons (feel free to add more reasons!) ...
- wrong parameterizations,
- wrong calculations,
- inappropriate sequence of operations,
- incorrect nesting of loops,
- missing termination conditions for loops,
- bugs in external libs,
- error in reasoning,
- coincidence,
- …?
Please, share your unintended "artwork" with us!
To get the topic started, I attach some of my latest artistic attempts.
I hope you will like them,
Robert