如何为我的硬币翻转模拟器创建一个硬币？

I created my Coin class for my Coin toss simulator but I have a few questions, what am I missing to make it flip 20 times (or is that something I write in the program?) and also, how do I create a "Coin" in my program? Here's the class so far...I created my Coin class for my Coin toss simula