Just need to translate to mt4

Hello dear Dev and Prog Community,

I need to test a pinescript indicator  found here : https://bit.ly/2FViT2i

for this I need you to convert this on mt4 language

thank you very much in advance

here is the script :

//@version=3
study(title = "Moving Average Combo", shorttitle="MA", overlay=true)
//ema

src = close //input(close, title="Source")
out1 = ema(src, 21)
out2 = ema(src, 50)
out3=ema(src,80)
plot(out1, color=blue, title="EMA 21", transp=20 )
plot(out2, color=blue, title="EMA 50", transp=20 )
plot(out3, color=blue, title="EMA 80", transp=20 )


//smma
len = 35
smma = 0.0
smma := na(smma[1]) ? sma(out2, len) : (smma[1] * (len - 1) + out2) / len
plot(smma, color=red ,title="SMMA" , linewidth=2 )