Broadcast the message "Go 1" in the first section of your if-then-else block. This means that when the Adventurer is close enough to Stone 1, a message will get sent to the Adventurer telling it to move to that stone.
Broadcast the message "Too far" in the second section of your if-then-else block. This means that when the Adventurer is NOT close enough to Stone 1, a message will get sent to the Adventurer, and the Adventurer will say "That's to far!"