how do you ?

How do you Measure distansis ?
I usualy Guess and then add more till it is right

If it is one object moving to another use:
X move to Y
or a complicated version:
X move [(X) distance to (Y)] toward target Y

If you want an object to come down to the ground use:
X move down [(X) distance above (ground)]

Or if you simply want to moniter the altitude or distance from an object:
create a variable
Variable set value [(X) distance to (Y)]
3dtext set text to [(variable) as a string] OR print [(variable) as a string]

ok I know that but I nead to know the distance X between them

my last one would work but so would
print X distanceto Y as a string.