Add screensaver to nspanel_blank.tft

And build a new tft with latest firmware and url for instructions.

custom_configuration/nspanel_blank_code/Program.s.txt

@@ -1,6 +1,5 @@
 Program.s
     //The following code is only run once when power on, and is generally used for global variable definition and power on initialization data
-    int sys0=0,sys1=0,sys2=0     //At present, the definition of global variable only supports 4-byte signed integer (int), and other types of global quantity declaration are not supported. If you want to use string type, you can use variable control in the page to implement
     bauds=115200//Configure baudrate
     dim=100//Configure backlight
     recmod=0//Serial data parsing mode:0-Passive mode;1-Active mode