Pinescript - Modification of Existing Session Code

The current indicator (script will be provided) draws the high and low of the Asia, London and New York Sessions. The session start/end times are hard coded by the user into the script.

Three changes required:

1) The indicator is to draw lines, which extend to the right, at Session High, Session Low, Session 25%, 50% and 75% values. User to be able to control color of each line and line type.

2) User can set which Session the lines are drawn from. If it is Asia, London or New York session.

3) Set how many Sessions in the past from today this is done.

User able to select, Asia, London or New York Session
User able to set if current Day/Session (set "0"), or how many sessions in the past (set "0,1,2,3,4,5 ... etc")

See attached examples. The Current Day/Session is referred to as Asia(0), London(0) and New York(0).

In first example, "Asia Session" is selected and the session is set to "0," data from current Day/Session.
In second example, "London Session" is selected and the session is set to "1", previous session data.
In third example, "New York Session" is selected and the session is set to "3", data from 3 sessions ago.

If you need any clarification or have questions please ask.