NETLOGO: How do I make a turtle die if there are two turtles on one patch? -

what i'm trying figure out how make 1 turtle die when there 2 turtles on 1 patch.

this i've been attempting far:

to deathbytubes   if ask patches [show count turtles-here] >= 2   [die] end 

how can fix works?

also, can me figure out how make turtle die when comes contact turtle alternative?

this kill turtles if there's more 2 on patch.

ask turtles [count turtles-here >= 2] [ die] 

this kill 1 turtle if there's 2 turtles on patch.

ask patches [count turtles-here = 2] [ ask one-of turtles-here[die]] 

if there's more 2 turtles, following work. basically, figure out patches have more 2 turtles , ask 1 of turtle's kill else 1 turtle remains.

ask patches [count turtles-here >= 2] [ ask one-of turtles-here [ ask other turtles-here[die]]]