Mirari Teach Me Time! Talking Alarm Clock & Night-Light

When I set the timers, the light is staying in the green function. I want it to be yellow at 8:00 pm and turn green at 7:00 am.

Can you set this clock to glow green but not sound an alarm?

How long does the green light stay lit? If I set it to turn on at 6:30 and my kid doesn't look at it until 7 or later, will it still be lit?

how long does the clock stay green for and is there an alarm or just change in color? (which is what I want no sound)