Python

for x in range(-100,100):
for z in range(-100,100):
mc.setBlock(x,3,z,2)
print (z)

for x in range(0,20):
for y in range(4,10):
for z in range(0,20):
if(x==y):
mc.setBlock(x,y,z,128)
print (y)

for x in range(20,30):
for y in range(4,10):
for z in range(0,20):
if(x-20==y):
mc.setBlock(x,y,z,128)
print (y)

Python For If

for x in range(78,86):
for z in range(-17,-9):
for y in range(4,24):
a=mc.getBlock(x,y,z)
if (a!=0):
mc.setBlock(x,y,z,41)
print (a)

for x in range(-150,0,10):
for y in range(0,100,10):
for z in range(-150,0,10):
mcdrawing.drawSphere(x,y,z,6,41);
print (z)

Python getBlock setBlock

import mcpi.minecraft as minecraft
import mcpi.minecraftstuff as minecraftstuff
import mcpi.block as block
mc = minecraft.Minecraft.create()
mcdrawing = minecraftstuff.MinecraftDrawing(mc)
mc.setBlock(430,30,128,1)
for y in range(0,30):
a=mc.getBlock(430,y,128)
print (a)