Before the first class- Step 2

This is the flower arrangement I made with my friend.

This is the picture of National Centre for the Performing Arts. It is located in the west side of Tiananmen Square in central Beijing, which is the Chinese highest national performing arts hall. The shape of this hall is just like a half of egg.

I just want to use square and cylinder to describe the scene of sunset glow. I want to use it to describe the scene of CBD under the sunset glow. The surface of the square  uses a gradient of color.