NONE = 0
EASE_IN_OUT = 1
EASE_IN = 2
EASE_OUT = 3
ELASTIC_IN_OUT = 4
ELASTIC_IN = 5
ELASTIC_OUT = 6
BOUNCE_IN_OUT = 7
BOUNCE_IN = 8
BOUNCE_OUT = 9
EXPONENTIAL_IN_OUT = 10
EXPONENTIAL_IN = 11
EXPONENTIAL_OUT = 12
SINE_IN_OUT = 13
SINE_IN = 14
SINE_OUT = 15
BACK_IN_OUT = 16
BACK_IN = 17
BACK_OUT = 18