mem[5]=1 --> mem[6] := mem[4]
	     mem[5] := 2;

food < 6 --> mem[5]:=1
             eat;

food mod 6 <= 3 --> right;

food mod 6 >= 3 --> left;

ahead[1] = 0 --> forward;

{ahead[1] != 1 and
ahead[1] != 2} and
ahead[1] != 0-1 --> attack;

mem[4] > mem[3] * 100 and mem[3] < (10 + mem[7]) --> grow;

mem[4] > 1000 --> mem[7] := mem[7] + 1
                  bud;
