Level
You can train your fingers in many ways. Here you see a hand moving 1 key at a time.
2
You can train your fingers in many ways. Here you see a hand moving 1 key at a time.
First you play 5 keys next to each other. Then you move your whole hand 1 key up and play the next group of 5 keys. Do not make your hand narrower when moving to the next group by only moving your thumb to your little finger. That's not a comfortable way of playing. If you move your whole hand, all fingers are immediately ready for the next 5 keys.