There are 720 lanterns in the order of 1 red, 2 yellow and 3 green. What color is the last lantern?

There are 720 colored lights, the order is 1 red 2, yellow 3 and green, and the last one is green. The arrangement rule of this string of lanterns is: 1+2+3=6 lanterns are arranged in the order of "one red, two yellow and three green", and 720 lanterns are divided into 720÷6= 120 (group). Because the last lantern of each cycle is green, colored lanterns, also known as lanterns, are very popular in China and have high artistic value. Lantern art is also a comprehensive decorative art of lamps. In ancient times, its main function was lighting. The outer skin of lanterns is made of paper or silk, the skeleton is made of bamboo or wood, and candles or light bulbs are placed in the middle to become lighting tools. Influenced by the Han culture, lanterns are also quite common items in temples in Asian Chinese areas and many countries.