def simulate(brower, alpha_simulate):
    print('----------------------------------------------------------')
    print("Simulate alpha: ", alpha_simulate)
    get_textarea = brower.find_element_by_xpath("//div[@id='code-editor-container']/div/div/textarea")
    get_textarea.send_keys(Keys.CONTROL, 'a')
    get_textarea.send_keys(Keys.DELETE)
    # Using Javascript for fastest
    brower.execute_script("arguments[0].value='{}';".format(alpha_simulate), get_textarea)
    time.sleep(2)
    # Click outside for prevent error
    htmlbody = brower.find_element_by_id("test-flowsexprCode")
    htmlbody.click()
    time.sleep(2)
    get_button_simulate = brower.find_elements_by_xpath("//form[@id='codeForm']/div[2]/div/div/div[2]/button")
    get_button_simulate[0].click()