Sudan is in Africa.
The flag of Sudan has three vertical stripes. They are red, white, and black.
There is a green triangle along the left side of the flag.
Sweden is in Europe.
The flag of Sweden is blue with a yellow/gold cross that extends to the edges of the flag.
Thailand is in Asia.
The flag of Thailand has five horizontal stripes. They are red, white, blue, white, and red.
The blue stripe in the center is twice as wide as each of the other stripes.