(1) The sheep will go up the mountain for a while and come down for a while. Wherever they go, they seem to be embroidered with big white flowers on the endless green carpet.
Compare "sheep" to "big white flowers" and "grassland" to "endless green carpet" Or compare The Hill to The Green Carpet? )
(2) After walking for a long time, I saw a round-the-island belt as bright as glass in the distance-the river!
Are there two metaphors in this sentence? (Compare a clear river to a ribbon as bright as glass, and a ribbon to glass) or just the former.
(3) Suddenly, a group of horses appeared on the distant hill, as if a gust of wind was blowing. Men, women and children dressed in various colors immediately danced like rainbows.
Compare "a cavalry team composed of men, women and children wearing various clothes" to "a rainbow". )