The boids class has been just created, now the flying condition will be defined
Fly towardsthe middle conditions
The function that calculates fly towards the middle has been splitted into two functions. The 1st is to claculate XS and YS, while the 2nd is for calculating XVS and YVS
Speed match was just added, next is moving according to velocity
Buliding the boid class
The flying conditions
Constructing the Boids calss