I am sorry to keep bothering but I need to learn more and I can't do this

I have a test soon and I need to pass.
So I need your help to do this then I will study it. I will give some of them a try and you guys can correct it for me. :X
Here is what i need to doRead the fallowing paragraphs. Change the active sentences to the passive form. Keep the same tense as the original sentence use the correct tense, the correct past participial form of the main verb and put the adverbials in the correct positions. not all of the sentences can be changed. Some by phrases are necessary , others are notIn the 1930's , pilots flying over Peru's Atacama Desert discovered the Nazca Lines.
Someone drew this huge pictures in the desert.
They despite such things such as birds , spiders and abstract geometrical designs.
Some designs represent flowers and animal.
Going to give it a try.........
1. In the 1930's , The Nazca Lines was discovered by pilots flying over Peru's Atacama Desert.
2. This huge pictures in the desert was drawn by someone.
3. birds , spiders and abstract geometrical designs was despite
4. flowers and animal was represented
Don't know if correct
I got more questions

waiting until someone help me with this one.