LISP Routine - what do I need to do to have a command finish before lisp routine goes on?

[jhein759286]

Using autocad 2018

the revcloud command does not finish, & the lisp routine continues on. Which makes it not work correctly. What do I need to add to make routine wait till revcloud command is done before continuing on with rest of lisp routine?

Here is what I have:

(defun C:jt2 ()

  (setq m:sc (getvar "dimscale"))

  (setq m:REVNUM (getstring "\nEnter the revision set: "))

  (command "-layer" "m" (strcat "REVISION_CLOUDS_" m:revnum) "")

  (initcommandversion -1)
  (command "_revcloud" "s" "c" "p" "a" (* 0.5 m:sc) "")

  (setq m:TAGLAY (strcat "REVTAG-" m:REVNUM))
  (setq m:PLACETAG (getpoint "\nPlace the cloud's tag: "))
  (command "-layer" "m" m:TAGLAY "")
  (command "._insert" "cloudtag" m:PLACETAG (getvar "DIMSCALE") "" "0" m:revnum )
  (princ "\nNow place the leader using a 3-point arc. ")
  
  (command "._arc")
)

I appreciate anyone's help