the problem is that it needs to be done with an analogue manner and the only one circuit i found using analogue is the above

 

Did you read post #10?

Do you know what a voltage divider is? If not, go to wiki and learn.

Do you know what a comparator is? If not, again, head to wiki.

Do you know what an H-Bridge is? If not, finally, head to wiki.

Those are the ONLY 3 components used in this circuit. Easy to learn and understand (hour tops), and you'll be able to either dazzle him with BS or give him the answer (same effect, usually)

Use words such as "assume the LDR is 50k on the bottom, but 75k on the top, this means <blah blah blah> and the panel moves.

 

Use words such as "assume the LDR is 50k on the bottom, but 75k on the top, this means <blah blah blah> and the panel moves.

My advice exactly. Just make whatever (reasonable) assumptions you need to, and proceed logically from there. The teacher likely won't have any better information than you do, and is looking for how you THINK, not details.