hey guys im ryan, im your guide to the life cycle of a star.
After we reach Protostar, we then hit Main sequence, all main sequence stars have fusion!
First we start off as a nebula. every star starts off this way including me we are low mass stars because were babies , its the earliest stage!! This also leads to protostar.
The main sequence star fuses hydrogen 
You then will notice it turns into a white dwarf. This is medium mass, we are in the middle cycle,
After main sequence i turn into a red giant which then leads me too turn to planetary nebula!!!
This is very close too the end we are now a neutron star! after nuetron star we become a black hole.
In this stage we are in high mass!  We are currently a Super Red Giant! after that we are  supernova !!
Well this is it guys, you have learned the life cycle of stars, i hope you had fun. Remember there are three masses,