Python Control Center & Launcher beta 1.1

#Python Control Center version "Beta 1.1"
#Coded by GameNationRDF
#It will be updated frequently with bug fixes and new feautures!
import webbrowser
import sys
import os
import string
import time
import math

currentVersion = ("Beta 1.1")
developer = ("Umut Bilgic")
year = ("2013")

def halfBlankScreen():
    for i in range(12):
        print("")

def blank():
    print ("")

halfBlankScreen()
print ("                             |--------------------|")
print ("                             |  LOADING LAUNCHER  |")
print ("                             |--------------------|")
halfBlankScreen()
time.sleep(0.5)

st1=("Here are the things you can do: ")
st2=("    * Type the website and hit enter to launch that website!")
st3=("    * Type 'file', and write the location of a file/program to launch it!")
st4=("    * Type 'c' to qucikly launch a file browser under 'file' menu!")
st5=("    * Type 'math' to do basic math operations!")
st6=("    * Type 'time' to set up a timer!")
st7=("    * Type 'ping' to open up the ping menu and ping websites!")
st8=("    * Type 'info' to get info about the program.")
st9=("    * Type 'exit' to close the program!")
introStringList=[st1, st2, st3, st4, st5, st6, st7, st8, st9]
for i in (introStringList):
    print (i)
    blank()

while True:
    userIn=str(input("Enter address/command here: "))
    blank()
    if userIn == ("exit"):
        print ("Program will close in a second..")
        time.sleep(1)
        sys.exit()
    elif userIn == ("file"):
        filename=str(input("    * Enter file place: "))
        blank()
        if filename == ("c"):
            c=("C:\ ")
            os.system("start " + c)
        else:
            os.system("start "+filename)
    elif userIn.startswith("www") is True:
        handle=webbrowser.get()
        handle.open(userIn)
    elif userIn == ("math"):
        op = str(input("Enter operation (+, -, *, /, exp, sqrt): "))
        blank()
        if op==("+") or op==("-") or op==("*") or op==("/") or op==("exp"):
            input_1 = int(input("   * Enter first number:  "))
            input_2 = int(input("   * Enter second number: "))
        if op == ("+"):
            print (input_1 + input_2)
            blank()
        elif op == ("-"):
            print (input_1-input_2)
            blank()
        elif op == ("*"):
            print (input_1*input_2)
            blank()
        elif op == ("/"):
            print (input_1/input_2)
            blank()
        elif op == ("exp"):
            print (input_1**input_2)
            blank()
        elif op == ("sqrt"):
            oneInput=int(input("    * Enter number: "))
            print (int((math.sqrt(oneInput))))
            blank()

    elif userIn == ("ping"):
        userWebsite=str(input("    * Enter the website: "))
        os.system("ping "+(userWebsite))
        blank()

    elif userIn == ("info"):
        print (" - Current Version: "+currentVersion)
        print (" - Developer: "+developer)
        print (" - "+year)
    elif userIn == ("time"):
        userTimeMode = str(input("  * Minutes or Seconds? (m/s): "))
        blank()
        if userTimeMode == ("m"):
            userLimitMin = int(input("  * Set your timer (minutes): "))
            blank()
            userLimit = (userLimitMin * 60)
        else:
            userLimit = int(input("    * Set your timer (seconds): "))
            blank()
        userMode  = str(input("    * Display mode? (y/n): "))
        blank()
        for i in range(1, userLimit):
            if userMode == ("y") or userMode == ("Y"):
                print (i)
            time.sleep(1.0)
        blank()
        print ("|---------------------|")
        print ("| Countdown finished! |")
        print ("|---------------------|")
        blank()

    else:
        print ("Sorry, unknown command!")
        blank()


#Changelog:
        # -Cleaner code.
        # -Quick File Browser launcher added.
        # -Ping websites with the new added ping menu.
        # -Loading screen added.
        # -Some fancy ASCII sutff :D.