if code == 'A':
                    if line[0] != 'R':
                        error == 1
                    else:
                        line = line[1:]
                        if line[0] == '-':
                            error == 1
                        else:
                            while len[0] != 'A' and 0<=int(line[0])<=9:
                                r = r+line[0]
                                line = line[1:]
                            if line[0] != 'A':
                                error == 1
                            else:
                                while len(line)>0  and 0<=int(line[0])<=9:
                                    a = a+line[0]
                                    line = line[1:]
                                if (int(x)+int(r))>(maxw/2) or (int(y)+int(r))>(maxh/2):
                                    error == 1
                                else:
                                    tt.reset()
                                    tt.up()
                                    tt.goto(int(x),int(y)-int(r))
                                    tt.down()
                                    tt.circle(int(r),360,int(a))
                                    tt.up()