which altera board should i use in my robotic project

hi thank you for respond

her it'is one function to display an O:

--O

Function Ch_O (y,x,Y_O,X_O,Taille:integer) return std_logic is --x and y are pixel column and row

begin --Y_O and X_O are position wher to diplay O

--Taille is size of character O

if((x-(x_O+(50*Taille/100)))*(x-(x_O+(50*Taille/100)))+(y-(Y_O+(50*Taille/100)))*(y-(Y_O+(50*Taille/100)))<=(50*Taille/100)*(50*Taille/100) and (x-(x_O+(50*Taille/100)))*(x-(x_O+(50*Taille/100)))+(y-(Y_O+(50*Taille/100)))*(y-(Y_O+(50*Taille/100)))>=(40*Taille/100)*(40*Taille/100) ) then

return '1';

else return '0';

end if;

end function Ch_O;

so like that i create for evry character(A B C D E ....) a funcion with mathematical equation to display them.

so when i display ABCDEFGHIJKLMNOPQRS at S its the error comme out :confused: .

i didnt even programme the motors drive yet.