What's wrong with the code

Ask Grasshopper Anything!
#1

Screenshot_2022-01-02-18-03-59-674_com.area120.grasshopper
Screenshot_2022-01-02-18-03-59-674_com.area120.grasshopper1080×2192 162 KB

Screenshot_2022-01-02-18-04-09-948_com.area120.grasshopper
Screenshot_2022-01-02-18-04-09-948_com.area120.grasshopper1080×2192 124 KB

Screenshot_2022-01-02-18-04-25-755_com.area120.grasshopper
Screenshot_2022-01-02-18-04-25-755_com.area120.grasshopper1080×2192 163 KB

Screenshot_2022-01-02-18-04-28-969_com.area120.grasshopper
Screenshot_2022-01-02-18-04-28-969_com.area120.grasshopper1080×2192 150 KB

Screenshot_2022-01-02-18-04-31-486_com.area120.grasshopper
Screenshot_2022-01-02-18-04-31-486_com.area120.grasshopper1080×2192 122 KB

This code doesn’t run. Please help me.

#2

Which lesson is this from?