A simplificated method to built up hexagrams either unchanged or with only one changi

To have for certain a hexagram with only one changing line or an unchanging hexagram use only one die (an earlier method I constructed: Here):
Throw the die six times to build up the hexagram from bottom to top, even numbers ie 2,4 and 6 being broken or Yinlines and odd numbers ie 1,3 and 5 being unbroken or Yanglines. Finally decide whether the hexagram being transformed or unchanged by throwing the die two more times and deciding thus: if those two casts gives the same number those number is the number of the changing line; if not the hexagram is unchanged.
Example:
Top: die shows five. Topline is unbroken. (-------)
Fifth: die shows five. Line 5 is unbroken. (-------)
Fourth: die shows four. Line 4 is broken. (--- ---)
Third: die shows one. Line 3 is unbroken. (-------)
Second: die shows six. Line 2 is broken. (--- ---)
Bottom: die shows one. Bottomline is unbroken. (-------)
Seventh throw: die shows 3
Eighth throw: die shows 1
Hexagram 37 is Unchanging.
OR
Seventh throw: die shows 4
Eighth throw: die shows 4
Hexagram 37 changes to hex. 13 (Fourth line being ---x--- )