I need a custom MQL code

[tec.nacks]

I need a custom MQL code that I can place in the code block

The code is to reset some variables to zero ... let's say var_1, var_2, var_3 to zero when a condition is meet

How should this code be written? Of course the variables will be in the variable table in FxD

[sktsec]

variable_name = 0 ;

[tec.nacks]

@sktsec tnaks