Please help me describe the meaning of every detail in this picture-Sakyamuni Thangka.

Buddha's clothes are robes, about seven clothes, and he sits in a crouching position. He holds a bowl in his left hand to show Tamparamita, and his right hand touches the ground to show possession. He was possessed by the devil outside, and the treasure tree behind him was covered with jewels, which showed that the Buddha's own happiness was solemn. The mani orb placed in front indicates that all living beings can wish. There are also fruits and other offerings.