Project...help?

I have a project to create in my metal work class and i just want to ask for opinion ideas etc... for my project folder which i need other people's view ....

here is the নকশা task....

প্রদর্শনী jumping is a very জনপ্রিয় throughout the world. নকশা and make a working model of a fence for a প্রদর্শনী jumping event, where the height of the fence can be adjusted electro-mechanically (limit/proximity switches should be incorporated as part of the control system)

any ideas for components and mechanisms and নকশা ideas would be greatly appreciated because i am really stuck :P

Thank আপনি
Alex (TheFan10's friend)