I successffully created my first sequence to take a picture of the whole bed.
All my plants are planted at Z=0, which is weird since Z=0 is home, and that is way up in the air. Anyways, when I take pictures of the whole bed, the camer is too high, so I wanted the camera to move to -200 and take all the pictures from there.
The sequence I created allows me to take pictures of whole group of plants, using the VARIABLE EXTERNAYLLY DEFINED, which works great. FB takes the coordinates from the plan position and moves there, however Z=0 for the plant, hence it is impossible for me to keep the camera at Z-200 even if I set it at the beginning in the OVERRIDE