Auto-translated
An example for slow learners:
Day 1. I go to the bakery, see fresh, delicious bread, and take it.
Day 2. I go to the bakery, see fresh, delicious bread, and take it.
Day 3. I go to the bakery, see fresh, delicious bread, and take it.
Day 4. I go to the bakery, see a moldy, stale loaf, tell the baker what kind of crap he's selling, and leave.
And then the baker says to me: "Why don't you bake some decent bread yourself, you idiot?"
Added 2 minutes later
If even this example doesn't help you, I suggest you don't write a thesis, but go to the army instead, or better yet, go back to school.