how to make progress bar

i want simple bar which start %50 when you click right button give you %10 percent when you miss button you lose %15. there are 2 buttons left and right these buttons flash randomly

 

Please use punctuation. I can read that so many different ways...
1. Start 50% when you click right button?
2. Start 50%. When you click right button give you 10%?
3. Give you 10% when you miss button?
4. When you miss button you lose 15%?

Anyway, analyze how the health bar works in this Unity Sample Project, then make your Progress Bar the same way...
https://www.assetstore.unity3d.com/en/#!/content/11228

 

ty i will try