def move_one_step(maparr, population, max_y, max_x):
    for status in population:
        for idnum, person in population[status].items():
            if not person["quarantine"]:
                y, x = person['loc_y'], person['loc_x']
                y_speed, x_speed = person['y_speed'], person['x_speed']
                y_dest, x_dest, = person["y_dest"], person["x_dest"]

                new_y, new_x = _get_next_position(x, y, x_speed, y_speed)

                if new_x == x_dest:
                    new_x_speed = 0
                elif abs(new_x - x_dest) >= abs(x - x_dest):
                    new_x_speed = -1 * x_speed
                else:
                    new_x_speed = x_speed
                if new_y == y_dest:
                    new_y_speed = 0
                elif abs(new_y - y_dest) >= abs(y - y_dest):
                    new_y_speed = -1 * y_speed
                else:
                    new_y_speed = y_speed

                if new_x == x_dest and new_y == y_dest:
                    # reached destination so now seeking new one
                    new_y_dest, new_x_dest = get_new_destination(max_y, max_x)
                    new_x_speed = 1 if x < new_x_dest else -1
                    new_y_speed = 1 if y < new_y_dest else -1
                    pu = {"x_speed": new_x_speed,
                          "y_speed": 1 if y < new_y_dest else -1,
                          "x_dest": new_x_dest, "y_dest": new_y_dest,
                          }
                    #                         person.update(pu)
                    population[status][idnum].update(pu)
                # check if in map
                if _is_pos_in_map(new_x, new_y, max_x, max_y):
                    # check if not taken already
                    if maparr[new_y][new_x] is None:
                        maparr[new_y][new_x] = person
                        maparr[y][x] = None
                        pu = {"loc_x": new_x, "loc_y": new_y,
                              "x_speed": new_x_speed,
                              "y_speed": new_y_speed,
                              }
                        population[status][idnum].update(pu)
                    else:
                        phase_x_speed = x_speed*2
                        phase_y_speed = y_speed*2
                        new_y, new_x = _get_next_position(x, y, phase_x_speed, phase_y_speed)
                        for i in range(5):
                            if not maparr[new_y][new_x] is None:
                                phase_x_speed = x_speed*2
                                phase_y_speed = y_speed*2
                                new_y, new_x = _get_next_position(x, y, phase_x_speed, phase_y_speed)
                            else:
                                break
                        if maparr[new_y][new_x] is None:
                            maparr[new_y][new_x] = person
                            maparr[y][x] = None
                            pu = {"loc_x": new_x, "loc_y": new_y,
                                  "x_speed": new_x_speed,
                                  "y_speed": new_y_speed,
                                  }
                            population[status][idnum].update(pu)

    return maparr, population