Find a mushroom in dark places. Get bonemeal by placing one bone on the crafting grid.;
, The size for grown red mushroom are: 5x5x6.
 Attach the ladders on 3 blocks of the trunk, closest to the ground.
 Use any material to cover the inside of the mushroom. Light up the inside with a torch.

Get a red mushroom and bonemeal.
Use the bonemeal on a red mushroom on the ground.
Get some ladders.
Build the floor.
Place a bed on the inside, and a crafting bench.
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