Difference between 'zu Hause' and 'nach Hause'

What is the difference between zu Hause and nach Hause?

→ means being at home

often used with verbs such as sein, bleiben, for example:

Ich bleibe morgen zu Hause.

Bist du schon zu Hause?

→ used when there is a movement towards home

often used with verbs such as gehen, fahren, kommen, for example:

Ich gehe jetzt nach Hause.

Wann bist du nach Hause gekommen?