The document summarizes the evolution of the Indian national flag over time. It began with an unofficial flag in 1906 with three horizontal strips. A second flag was raised in 1907 featuring a lotus and stars. The third flag in 1917 had alternating red and green strips and symbols representing independence. Pingali Venkaiyah designed the fourth flag in 1921 with red, green and white strips representing religious communities. The fifth flag in 1931 was adopted as the national flag featuring the spinning wheel. On July 22, 1947 the Constituent Assembly adopted it as the free Indian national flag, replacing the spinning wheel with the Ashoka Chakra which has 24 spokes representing virtues.