How many bars are there in the first grade frog nursery rhyme?

The first section talks about the weather and highlights the characteristics of frogs. The second sentence says that frogs can catch pests for crops. The third sentence calls on everyone to protect the little frogs and make the crops healthy and rewarding.

"Little Frog" The river is clear and the weather is sunny. The little frog has a pair of big eyes. Many good things have been done to protect seedlings from pests. Please take good care of the little frog so that the seedlings won't get sick.