find/copy Mtext string, assign it to attribute

[Anonymous]

Hello,

background: texts to be replaced by a block (attributes) in paper space of many plans

1<: find and copy text string from a Mtext (in my sample: detail en plan) and paste it in value of an attribute (tag name: titre2, block name: FR-ATTR-****); this text varies from plan to plan, however their coordinates are the same, so I assume script or lisp can find it throught its location?

2<: same thing for another text (text: 12 de 12,again varies from plan to plan; tag name: Feuillet; same block)

3<: change the the third value with a text: 20000-AAA-04 (tag name: planno, same block)

I'm pretty new to lisp/script and have searched related posts but couldn't find exact what I need.

Any help would be much appreciated.