Ai

lock throttle to 1.
stage.
wait until SHIP:ALTITUDE > 20000.
lock throttle to 0.
lock steering to heading(90, 80).

wait until SHIP:ALTITUDE > 80000.
lock steering to heading(90, 0).

wait until SHIP:APOAPSIS > 80000.
lock throttle to 0.

wait 1.
print "Coasting to Duna!".

lock steering to prograde.
wait until SHIP:BODY = "Duna" AND SHIP:PERIAPSIS > 0.

print "Performing aerobraking at Duna!".
lock throttle to 0.
lock steering to retrograde.
wait until SHIP:PERIAPSIS < 30000.

print "Circularizing orbit around Duna!".
lock throttle to 1.
lock steering to prograde.
wait until SHIP:PERIAPSIS > 100000.

lock throttle to 0.
print "Mission to Duna complete!".