Search an item in google using robotframework

I am not able to understand how I can set my robotframework's script to do a simple search on google.

This is my script:

*** Settings ***
Documentation                                      This is a basic test
Library                                            Selenium2Library

*** Variables ***
${url}                                              https://www.google.com
${browser}                                          chrome
${text}                                             xpath=//*[@id="lst-ib"]

*** Test Cases ***
User can open page
[Documentation]                                 As a user I can open the 
google page

open browser                                    ${URL}  ${BROWSER}
wait until page contains                        ${url}
close browser

User fill in the Search text box
[Documentation]                                 The user search 'Test 
Definition'

open browser                                    ${URL}  ${browser}
wait until page contains                        ${URL}
input text                                      ${text}  Test Definition
click button                                    btnK
wait until page contains                        Testenter code here

Can you help me where I made the mistake?

Thanks