If you want your program to wait for n seconds, use below code.
Paste Behat Script to your FeatureContext.php file and your Gherkin step to your feature file.
Example 1: Using Sleep Method
Gherkin
And I wait 5 seconds
Behat Script
/**
* Waits a while, for debugging.
*
* @param int $seconds
* How long to wait.
*
* @When I wait :seconds second(s)
*/
public function wait($seconds) {
sleep($seconds);
}