Click the green flag to start.Drag the match to the smoke detector,then drag it away or click the pull station to activate the system.Drag the BLACK key slightly above the text the says BLACK KEY HERE to enable the controls.If you do not do this,you cannot reset or silence the system.After enabling the controls,Drag your mouse over silence to silence and over reset to reset.To reset the pull station,Drag the grey key to the BLACK keyhole at the bottom right corner of the pull station to reset it.