Then buy a timer from Homedepot. This is one of them:
http://www.homedepot.com/p/Intermatic-15-Amp-Heavy-Duty-Indoor-Plug-In-Dial-Timer-TN311/203954918
Then buy a timer from Homedepot. This is one of them:
http://www.homedepot.com/p/Intermatic-15-Amp-Heavy-Duty-Indoor-Plug-In-Dial-Timer-TN311/203954918