On going

The lamps were to be burning evening til morning continually.
The 12 loaves of bread were to be placed on the table every sabbath continually.
Incense was to be offered continually.
The seventh year was to be a sabbath for the land. No crops were to be grown on the seventh year (whatever the land produced they were allowed to eat...but they could not grow anything).
After 7 times 7 years, the 50th year was to be a year of Jubilee. On that year, they were only to take what was grown in the fields (not everything that the land produced on its own).
God promised that on the 6th year the land would produce extra food for them (Lev 25:20-21).
God was showing that if they kept trusting Him, he would provdie for them continually.