[Online Slot Symbols Logic Creation]

Hi Everyone! 🙂

I need a little help out here! 

I'm planning to create an online 5x3 slot game, and was wondering if there's a logic on how these symbols are placed in each reel? 😅

Is there a doc online/video tutorial I can refer to? Or can anyone out here in this forum help me? 🤔

I've played slot games currently present in the Play Store but I can't seem to figure out how these symbols are placed (logic) in each reel? 😓 

I hope I'm not breaking any forum rules or posted this topic in the wrong part of the forum? 😬

Thankyou! 😊