You'll want to search the manual entries for loops!
It'll explain what you need a lot better than me.
but for example, your events could also be done like this:
+Repeat 7 times
->System |wait loopindex*0.05 seconds
->Enemy2 |Spawn EnemyBullet on layer1
->EnemyBullet |Set angle to 180-(loopindex*10)
edit: but you'll need to make sure this repeat event isn't run every single tick, otherwise you'll have thousands of bullets.. putting a "trigger once" condition above "repeat.." may be okay.