My variable should change it's self but he is setting itself i look to the code and I see that I am actually using change so why is it setting it? And when I want to set it to -10 then it's setting it for a 0.01 to -10 and then again to -1.2

when green flag clicked
set [ gravity] to [-1.2] 
forever
change [v] by (gravity) 

when I receive [blue soul]
set [v] to [-10]

(the code that I use)

How Does The micro:bit Extension Work?