Comma splice sentences

I looked at my first practice writing piece for my English class, and my teacher had looked at them, and she said I didn't have any comma splices, and I looked through my first actual writing assignment and it doesn't look like it has any either, these are my only writing assignments I have had. I am not really sure how to write a comma splice sentence, but I will try, these are just some sentences I had made. 

Maria is extremely tired, she went to work. At work, she keeps falling asleep, someone wakes her up every time. She keeps falling asleep, she gets woken up by her coworkers many times. At the end of her working shift, she was happy to go home, her boss talked to her first about getting more sleep. Maria went home, she wanted to sleep, she got Hungary. She ate first, then went to bed.