Everyone must cultivate manure in your bed and make your bed like rectangle( top of bed is 0.8 meter wide and 4.80 cm. and level top of your bed too. All rim of 4 side for top of you bed must do like small hill about 1-2 inches high because I will measure from this) If you miss 1 cm. it mean 1 hr.,I will measure 4 side of top of your bed after April 4 9 :00