Q: My screen is frozen in text edit ( the swirling  lollipop) how do I close the screen or exit

While using text edit my screen froze, now I have the spinning beach ball, or spinning lollipop, but I cannot close the text edit screen.  I was transferring data from a web sit when this occurred perhaps too much data???  made this happen not sure but I resorted to using Pages which I am not familiar with at all. Any instructions and explanation would be appreciated. Thank you.