kRPC code

import krpc
import time
import math

def main():
    # Connect to the server with the default settings
    # (IP address 127.0.0.1 and port 50000)
    print 'Connecting to server...'
    ksp = krpc.connect(name='Example script')
    print 'Connected to server, version', ksp.krpc.get_status().version

    vessel = ksp.space_center.active_vessel
    orbit = vessel.orbit
    control = vessel.control
    auto_pilot = vessel.auto_pilot
    flight = vessel.flight(ksp.space_center.ReferenceFrame.surface)
    resources = vessel.resources
    surface = ksp.space_center.ReferenceFrame.surface
    orbital = ksp.space_center.ReferenceFrame.orbital

##    mass_lf = resources.

    # Set the throttle to 100% and enable SAS


    # Countdown...


    t1 = time.clock()
    control.activate_next_stage()
    # Activate the first stage
    print 'Launch!'
    auto_pilot.set_direction(flight.up_direction)
    control.throttle = 1
    time.sleep(6)
    auto_pilot.set_rotation(45, 0)
    time.sleep(4)
    control.throttle = 0
    count = 0
    print(flight.retrograde, type(flight.retrograde))
    auto_pilot.set_direction(flight.retrograde, 0, ksp.space_center.ReferenceFrame.surface)
    control.throttle = 1
    time.sleep(2)
    vspeed_curr = flight.vertical_speed
    while True:
        if count < 50:
            count += 1
        if count == 50:
            auto_pilot.set_direction(flight.up_direction, 0, referenceFrame = ksp.space_center.ReferenceFrame.surface)
        vspeed_prev = vspeed_curr
        vspeed_curr = flight.vertical_speed
        delta_vspeed = vspeed_prev - vspeed_prev
        if vspeed_curr > 0:
            control.throttle = 0
        if flight.true_altitude < 250:
            if vspeed_curr < -10 or delta_vspeed < 0 and control.throttle < 1:
                control.throttle += .2
            if vspeed_curr > -5 or delta_vspeed > 0 and control.throttle > 0:
                control.throttle -= .2
        if flight.true_altitude < 5:
            control.throttle = 0
            break

main()