Netlogo: Moving turtles and calculate distance - netlogo

Question

I'm currently do my project about path planning.
So the step of my plans are like this:
Click "setup" to arrange all the coordinate
Click "start" to create the moving turtles
Click "go" to make the moving turtle going to nearest coordinate (label with "x")
Which mean, at step 4, the moving turtle already calculate it's distance with every coordinate.
Here I attach the interface and the coding
to setup
clear-all
set-default-shape turtles "x"
create-turtles 9
ask turtles[set color red]
ask turtle 0[setxy 0 15]
ask turtle 1[setxy 4 15]
ask turtle 2[setxy -4 15]
ask turtle 3[setxy 0 12]
ask turtle 4[setxy 4 12]
ask turtle 5[setxy -4 12]
ask turtle 6[setxy 0 9]
ask turtle 7[setxy 4 9]
ask turtle 8[setxy -4 9]
end
to start
set-default-shape turtles "airplane"
create-turtles 1
ask turtle 9[setxy 0 -15]
end

Answer 1

Don't forget that distance depends on your topology.
to setup
clear-all
let targets [
[0 15] [4 15] [-4 15]
[0 12] [4 12] [-4 12]
[0 9] [4 9] [-4 9]
]
foreach targets [xy -> ask patch item 0 xy item 1 xy [
sprout 1 [set shape "x" set color red]
]
]
create-turtles 1 [ set shape "airplane" setxy 0 -15]
end
EDIT: If you treat all other turtles as eligible targets, then once you move turtle 9 to a target it will stay there. If you do not want that, you say that a turtle in the same location is not eligible:
to move
ask turtle 9 [move-to min-one-of eligibles [distance myself]]
end
to-report eligibles
report turtles with [0 < distance myself]
end