Explain the usage of while, during, for and make up five sentences with these conjunctions

Объясните, для чего используютмя: "While", "For", "during", и напишите 5 предложений, используя эти слова (соединительные).
while - В то же время. Одновременно с чем то или кем то.
during - В течении времени. На протяжении времени.
For - Для.
1. During the 2000s
2. I stayed in London during a week.
3. You can go swimming, while I am having lunch
4. There is a letter for you.
5. It is a book for children.