resizing widgets

from guizero import App, PushButton
app = App()

button = PushButton(app, height=10, width=20)
button_sized = PushButton(app, width="fill", height="fill")
button_sized.bg = "green"
button2 = PushButton(app, height=1, width=5)
button2.bg = "blue"
button3 = PushButton(app, height=5, width="fill")
button3.bg = "yellow"

app.display()