How do I make smooth rotation

On right button clicked 
Cursor is over the Enemy
                   Pick [b]player [/b]where player.selected=1
                   Every 0,1 seconds----->rotate 20*dt degrees towards (LastX,LastY)[/code:2t3958gt]

But the player rotates only once, is this can be done withot plugins.

global number target= -1

on right clicked on enemy
--- set target to enemy.uid

Player.selected = 1
pick enemy by uid target
every 0.1 seconds
--- rotate 20*dt derees towards (enemy.x, enemy.y)[/code:1wh115d3]