Go inside and open the treasure chest here to get a small key.

Hit the crystals in the correct order and the door will open up. Look at the locked door in the first room and you’ll see another one of those gem locks. This means that the order in the room is Bottom, Top, Bottom, and Right. If you look at the next three of them in order, you’ll see the lights are Top, Bottom, and Right, respectively. Look at the one with just 1 red spoke and you’ll see the light is at the bottom of the symbol. Each of them has a number of red spokes, and the top of the symbol is the side the red spokes are on. Clear all the sand in the room and you’ll find four circular symbols on the ground.

Defeat the arachas in this room and then pull out your gust bellows.