from mcpi.minecraft import Minecraft
mc = Minecraft.create()
x, y, z = mc.player.getTilePos()
a = 0
while a < 20:
    mc.setBlocks(x - 20, y - 1, z, x + 20, y - 10, z, 19)
    z = z + 5
    a = a + 1

c655e004966fb4320bf0319651a0ca3dc67b0cd5
<mask token>

<mask token>
while a < 20:
    mc.setBlocks(x - 20, y - 1, z, x + 20, y - 10, z, 19)
    z = z + 5
    a = a + 1

<mask token>
mc = Minecraft.create()
x, y, z = mc.player.getTilePos()
a = 0
while a < 20:
    mc.setBlocks(x - 20, y - 1, z, x + 20, y - 10, z, 19)
    z = z + 5
    a = a + 1

from mcpi.minecraft import Minecraft
mc = Minecraft.create()
x, y, z = mc.player.getTilePos()
a = 0
while a < 20:
    mc.setBlocks(x - 20, y - 1, z, x + 20, y - 10, z, 19)
    z = z + 5
    a = a + 1
