Referenced before assignment?

name="blank"
import os

#Set up all the processes and functions etc.
#----------------------------------------------------------------
def initLocations():
    locName = ["The Town","The Blacksmith Hut","The Pub","The Street","The Library"]
    locDesc = ["A Small Town","A Small Hut","A nice pub","An ancient paved street","Filled with brilliant books"]
    return locName, locDesc

def initVariables():
    global health
    health=10
    global currentLoc
    currentLoc=0
    return currentLoc, health

def gameInit():
    initVariables()
    initLocations()

def mainProcess(command):
    if command=="help":
        displayMessage("help")
        pass
    if command=="play":
        gameInit()
        pass
    if command=="move":
        displayMessage("move")
        pass

def displayMessage(call):
    os.system("cls")
    if call=="help":
        print("**HELP**")
        print("")
        print("The Adventure Game uses a system of commands")
        print("Here is a list of currently known commands:")
        print("")
        print("- MOVE - Allows the player to move left or right")
        print("")
        input("Press any key to return....")
        pass
    if call=="move":
        print("Move where?")
        print("")
        if currentLoc==0:
            print("Left: You cannot move left.")
            print("Right: " + locName[currentLoc+1])
        elif currentLoc>1:
            print("Left: " + locName[currentLoc-1])
            print("Right: " + locName[currentLoc+1])
        print("")
        print("Move left or right? Enter your choice.")
        direction = input("?: ")
        if direction=="left":
            print("Moved left.")
            if currentLoc>1:
                currentLoc = currentLoc-1
                pass
        elif direction=="right":
            currentLoc = currentLoc+1
            pass
    pass
    input("Press any key to return....")
    os.system("cls")
#----------------------------------------------------------------

#Main Game

print("Adventure Game")
print("")
print("Please enter your name: ")
name = input("?: ")

while name=="":
    os.system("cls")
    print("* - Make sure you enter a name.")
    print("")
    print("Please enter your name: ")
    name = input("?: ")
    pass

print("Hello, " + name + "!")
print("")

global currentLoc
currentLoc, health = initVariables()
gameInit()
locName, locDesc = initLocations()


#Let's say the final location is 20.

while currentLoc<20:
    print(currentLoc)
    #Locations
    print(locName[currentLoc])
    print(locDesc[currentLoc])

    print("Type 'Help' for advice on what to do next.")
    passedCommand = input("?: ")
    mainProcess(passedCommand)