Draw a diagonal line at the diagonal of the paper with a light green pen, and then draw a line parallel to the diagonal line between the diagonal line and the lower right corner.
Then draw several parallel vertical lines with brown strokes, and at the same time draw several pale yellow stars to decorate the vertical lines.
If you have a sticker, you can decorate it with rainbows and clouds in the upper left corner. If there is no sticker, you can draw one yourself.
Finally, write a book of poems in dark green between the green lines, thus making a simple cover.