Code for EMA crossover strategy

Kindly help me on writing code for the below strategy:

Buy: Price higher than the EMA (13,34) CROSSOVER candle high

Sell: Price lower than the EMA (34,13) CROSSOVER candle low

As per the above condition

Buy Script:

LAST > CROSSOVER(EMA(HIGH,13),EMA(HIGH,34))

Sell Script:

LAST < CROSSOVER(EMA(HIGH,34),EMA(HIGH,13))