Problems with 'for' in bash

I am trying to run this small script but I got some errors

#!/bin/sh

set event_list = "17 20 21"

for event in `($event_list)`
echo Evento $event - Tarro
end

Thank you so much!!!

if you use for loop then you need to stick to its syntax:

#!/bin/sh

export event_list="17 20 21"

for event in $event_list
do
   echo Evento $event - Tarro
done