Anyways I have to go so here's what I think you want.
Code:
Untitled Trigger 001
Events
Time - Every 1.00 seconds of game time
Conditions
Actions
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
(Distance between (Position of Peasant 0000 <gen>) and (Position of Summer Tree Wall 0000 <gen>)) Less than or equal to 100.00
Then - Actions
Game - Display to (All players) the text: Distance is less th...
Else - Actions
Game - Display to (All players) the text: Distance is more th...