What is the Third Stage of Stars?

8. Then, after a Long Time, the Hydrogen in the Core will Run Out, and Heavier Elements are made due to Fusion. 9. Star will Swell Up and become Red [As the Surface is Cooling] marking the Beginning of a Red Giant [This is the Path our Sun will take] 10. If the Main Sequence Star was even Bigger, then it will Shine even more Intensively as because More Fusion is Present of Heavier Elements in Nuclear Reactions.