* "Cover" sign: You can sign "cover" and then point to a bed or yourself to indicate that you're covering yourself with a blanket.
* "Sleep" sign: You can sign "sleep" and then use the "cover" sign to indicate that you're using a blanket to sleep.
* "Warm" sign: You can sign "warm" and then touch your chest to indicate that you're feeling warm under the blanket.
It's important to remember that sign language can vary depending on the region and the individual signer's style. You can also look up the sign for "blanket" in a sign language dictionary or website.