Stair maker using python

Below is my code for a stair generator that I created using simple rotations and structured coding. The first 2 pictures are my code in Maya's python. 

Below is a segment of my work that is working, the stair masters button layout is below and shows that it is working within the code.

Below is unfortunately the errors I encountered during the coding process as I could not work out what the syntax error was, I tried my best in trying to figure it out I managed to get the button code working great but not the rest of the code unfortunately.

The code that is in red does not work due to a syntax error however the code in green does work and there is evidence of this above. 

import maya.cmds as cmds


if cmds.window("Stairmaster",exists=True):
 cmds.deleteUI("Stairmaster")
window=cmds.window("Stairmaster", title= "Jack's Stair Master")
cmds.columnLayout()
cmds.text(label='StairSize')
cmds.text(label='Step Number')
cmds.intField("Steps", minValue=0,maxValue=50,value=1)
cmds.button(label="Spiral Mode", command="Spiral()")
cmds.button(label="Boring Regular Mode", command="Normal()")
cmds.button(label="Regular With Rail Mode", command="Rail()")

def Spiral():
 Nstep=cmds.intField("Steps", q=True, value=True)
 step=[]
 for number in range(Nstep):
  print number
  step.append(cmds.polyCube(w=5, d=2, h=5, n='Smallstep')[0])
  cmds.move(3, number*1,0,r=True)
  cmds.xform(ws=True, rotatePivot=(0,0,0))
  cmds.rotate(0,15*number,0)

 twiststeps=cmds.group(step, name="twiststeps1")
 towerpillar=cmds.polyCylinder(r=2, h=Nstep, n="pillar1")
 cmds.move(0,9.6,0,r=True)
 EntireStaircase=cmds.group('twiststeps1','pillar1' n='EntireStaircase')
 
 
def Normal():
 Nstep=cmds.intField("Steps",q=True,Value=True)
 step[]
 for number in range(Nstep):
  print number
  step.append(cmds.polyCube(d=2, h=1, w=8, n='Smallstep')[0])
  cmds.move(0,number/1,number/-5)
 Staircase=cmds.group(step,name='Staircase')
 print step
 
 
def Rail():
 Nstep=cmds.intField("Steps",q=True,Value=True)
 step[]
 for number in range(Nstep):
  print number
  step.append(cmds.polyCube(d=2, h=1, w=8, n='Smallstep')[0])
  cmds.move(0,number/1,number/-5)
 Staircase=cmds.group(step,name='Staircase')
 print step

 Leftrail=[]
 for number in range(Nstep):
  print number
  Leftrail.append(cmds.polyCylinder(r=.05, h=6)[0])
  cmds.move(3.0, number/1.0, number/-.5)
 lilLrail= cmds.group(Leftrail,name = ‘lilLrails’)
 cmds.move( 0, 3, 0, r=True, os=True, wd=True)
 print Leftrail

 Rightrail=[]
 for number in range(Nstep):
     print number
        Rightrail.append(cmds.polyCylinder(r=.05, h=6)[0])
     cmds.move(-3.0, number/1.0, number/-.5)
 lilRrail= cmds.group(Rightrail,name = ‘lilRrails’)
 cmds.move( 0, 3, 0, r=True, os=True, wd=True)
 print Rightrail

 banisLeft = cmds.polyCube( sx=1, sy=1, sz=1, h=.2, w=.5, d=17,n = ‘banisLeft’)
 cmds.rotate(27, 0, 0)
 cmds.move(2.96, 9.381,-6.71)
 banisRight = cmds.polyCube( sx=1, sy=1, sz=1, h=.2, w=.5, d=17,n = ‘banisRight’)
 cmds.rotate(27, 0, 0)
 cmds.move(-2.96, 9.381,-6.71)
 arms=cmds.group('banisLeft', 'banisRight', 'lilRrails', 'lilLrails', 'Staircase',n='EntireRailStaircase')

cmds.showWindow()