This code will turn all of the micro:bit's LEDs off:
display.show(Image('00000:'
'00000:'
'00000:'
'00000:'
'00000'))
This will turn them all on, to full brightness:
display.show(Image('99999:'
'99999:'
'99999:'
'99999:'
'99999'))
What do you think this one will do?:
display.show(Image('99999:'
'77777:'
'55555:'
'33333:'
'11111'))
Test them out in your code!
You can design your images on paper using a 5x5 grid.