Input text: A large flat silver wall is next to a large flat silver wall. The wall is facing east. A 4 feet wide [antarctica] circle is below the wall. A 9 feet wide [africa] circle is below the circle. A 14 feet wide [europe] circle is under the circle. A 20 feet wide [asia] circle is under the circle. A 40 feet wide [americas] circle is under the circle. The azimuth of the sun is 180 degrees. The altitude of the sun is 70 degrees.