How to draw Ai Qing's green painting in the tenth lesson of the next Chinese book in grade four?

Only one kind of green is used to draw leaves, only white is used to lighten the color, and black or dark brown is used to darken the green.

The main contents are as follows: In this poem, the poet depicts with rich imagination that spring is full of green, green is the color of life and a symbol of hope, and the poet eulogizes the green hope in his heart and an era full of green.