In this room, don't enter the door directly north of you but go to the west end and use Move on the left-most statue. Enter this door.

In this room, go south then east and jump across the gap. Push a stone to the position that is south of the space. Use Carry to put the stone into the space. Use the same method to put another stone into the second space.

Jump back to the west and climb the ladder. Push the stone all the way to the east and use it to block the flame. Walk on the rope and walk all the way to the south. Here, push the statue to the east. Now, set Sand as one of your hot keys.

You have to pass through the statues. You can avoid the flame by standing on the green square and using Sand. Leave the square when the statue passes. Use the same method for the second statue. Go west, climb down the ladder and exit this room.

You are outside the tower. Go up and use Blaze on the yellow flame. You have lit the human symbol. Leave this tower. Now use Retreat to leave the lighthouse. Reenter, use the staircase in the central. Go up one more floor, and you will be in the symbol room again.