Parts List:

• Plate 1 x 1 (2)
• Plate 1 x 2 (4)
• Plate 1 x 3 (1)
• Plate 1 x 4 (1)
• Plate 1 x 8 (2)
• Plate 2 x 2 Corner (1)
• Plate 4 x 4 (1)

Notes:

• Again, all of these new plates should be at the same level.
• That 1 x 4 plate should be floating; don't connect it anything yet.  Just remember that it's at this level (it'll be obvious later, trust me).