HTTP/1.1 200 OK Date: Tue, 12 Jun 2001 17:37:07 GMT Server: Apache/1.3.12 (Unix) ApacheJServ/1.1.2 Set-Cookie: Apache=204.210.50.240.24903992367427759; path=/ Last-Modified: Tue, 21 May 1996 20:08:43 GMT ETag: "a1889-a4-31a222cb" Accept-Ranges: bytes Content-Length: 164 Connection: close Content-Type: text/plain Switch You can use a switch to change levels while simulating. If you are simulating your schematic, press on the switch and you'll see it is changing.