Threads for my Overlock Machine

Today, I am very excited. My second hand Singer Overlock machine will be delivered to my house this evening. *Hurray*

The funny thing was I did not have any threads at home to test the machine. I forgot to buy them yesterday at the shop. Nevertheless, I went to a hardware store and bought 3 rolls.

White threads
Can't wait to play with my new toy this evening. Now, where can I place it? *headache*