[MWForum]problem with clickon

[Daniel Ajoy]

On 23 Jan 2005 at 10:40, Zehava Wizman wrote:

> Hi all!
> I send this question month before and get no answer' maybe the message got 
> some problem , so I send it again:
> here attached a project,in the project, there is a procedure "my_car"  that 
> lights the yellow lights, then green lights and then activate proc "car" and 
> "car1" (within command clickon), after finishing "clickon", the yellow light 
> must be activate. My question is: the yellow light start to flash while the 
> cars are moving,why it's so????
> 
> I expected that "t5, yellow" -  will start only after the command "ask[t8 
> t9] [ clickon] has been finished.

Hi Zehava,

Nope.

ask [t8 t9 ] [clickon]

starts a parallel process at the moment it is executed.
Whatever t8 and t9 are supposed to to when clicked 
will happened at *the same time* as the instructions 
following:

ask [t8 t9 ] [clickon]

namely:

t5, yellow
t4, red

t4, red
t8, setpos [11 129]
t9, setpos [68 -131]

reds


Instead of:

ask [t8 t9 ] [clickon]

I would use:

cars

The cars procedure is:

to cars
repeat 53 [
 t8, fd 5 
 t9, fd 5 
 wait 0.1
]
end

Daniel
OpenWorld Learning
http://mia.openworldlearning.org