# Read values from the sensors at regular intervals # Use negative number for "pixels" instead of "points" # Resize font based on frame height (minimum size of 12) # Automatically resize font size based on window size Root.attributes('-fullscreen', fullscreen) # Toggle between fullscreen and windowed modes # Global variable to remember if we are fullscreen or windowed On your Raspberry Pi (in your home directory, /home/pi), open a new document with the name clock.py: language:shellĬopy in the following code: language:python We'll use this program when we want to demonstrate how to start a program on boot that requires the X windows system (for example, you want to make a graphical dashboard that is displayed on boot). The next example that we'll use is slightly more complicated, as it relies on a GUI made with the Tkinter package. Connect an LED and a 330 Ω resistor between GPIO12 and GND on the Raspberry Pi. While external connections to hardware is not necessary to show how to run a program on boot, it can be a useful way to show that something is running in the background, even if you do not see anything on the screen.
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