title: How to kill of all turtles except for one?
body: <p>Im making a race model. the function is that the turtles move across the grid horizontally starting at xcor -13 to xcor 13 at speeds that
  constantly vary and when a turtle reaches xcor = 13, all of the other turtles (besides the one that crossed first) die</p>
  
  <pre><code> to Race
      wait .3
      fd random 5
      if xcor = 13  ( this is where i want to tell all other turtles to die )
   end
  </code></pre>
  
  <p>how do i ask all other turtles to die?
  THe first answer doesnt help me, someone else please respond</p>