I want to Rotate my Stepper Motor only once when the light detector detects light below 400, but it keeps rotating.
please, please never ever again post pictures of text... Not only they are not readable nor usable directly for copy&paste but they use up lots of storage and internet bandwidth which contributes to polluting the planet.
➜ do your part and do yourself a favour and please read How to get the best out of this forum and modify your post accordingly (including code tags and necessary documentation for your ask).
Ok 
you can edit your first post, remove the image and paste the code within code tags instead.
I made a new post but couldn't delete this one
OK - I'll close this one then so that there is only one discussion