Starting location: Inside the Clock Tower, south of Ardougne. Talk to Brother Kojo.
Quest difficulty level: Medium.
Reward: 500gp.
Quest points gained: 1.
Required Skills: You must be able to defeat or run from at least one level 53 ogre.

When you go down into the basement, you will see a square on the floor with four different colours. They will all point to the way to go to get the cog of that colour.
White Cog: First find the rat poison. This is in the basement of the clock tower. Try to find where the cages of dungeon rats are and on that hallway you will find the rat poison. Pull the levers, first lever that you’ll find will be up and last one will be down. Now the gates should open. Use rat poison with the trough and then go to the closed gate. It will open, now get the cog and go upstairs. Go to the upper most floor and put the white cog on the white pole.
Blue Cog: Go outside and head east until you find a monk with barrels and go down the ladder and continue until you see an odd looking wall, push it and get the blue cog. Go in the Tower and put it on the second floor blue pole.
Red Cog: Go down to the basement again, and enter the south-eastern door, go all the way to the end of the hallway, and you’ll see some ogres. Go past the ogres and get the red cog and put it on the first floor on the red pole.
Black Cog: Get a bucket of water. (A bucket is near the drunk monk at the barrels. Use bucket with well to get bucket of water). Go down into the basement and go to the spiders, put the water on the cog and then pick it up. Put the black cog on the black pole in the basement.