The red disk represents the sun and the blood shed for the independence. The green background represents the lush nature of the country. The golden yellow was present in the former flag of the country, so I decided that it could be a good color to divide the red and the green.
I also added some elements from the country's "emblem": the water lily, the national flower, and the wavy stripes, representing the many rivers of the country, that are also much important to Bangladesh's economy.
Comments are welcome.
Suggestions for new posts, etc. will be gladly received.