Add a bed.
Then add any carpet of your choice in 2 rows like this.
Place stairs next to the beginning of your carpet 3 blocks high.
Then add a half block above the bed at the top of the staircase and add a whole block next to the half block.
Place a bed on the whole block and carpet on the half block.
Add a third row at the top and put a whole block on top of each one like so.
Then add carpet.
Fill in the bottom.
And your done!
I hope you enjoyed an remember to enter my drawing contest!