Wool are blocks that can be obtained in 2 ways in the game, and can be used to manufacture beds, carpets, and other items..

1 - Wool can be dropped by sheep, usually white, but if the sheep has another color, the wool dropped will be the same color as the sheep..

2 - You can make a wool block using cotton, I know it doesn't make any sense, but in minetest this is possible...

3 - To get different colors , you can use dyes , see how to make them in the recipes tab …