How to spllit laserscan data from lidar into sections and view them on rviz

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I was trying to split the laser scan range data into subcategories and like to publish each category into different laser topics.

to specify more, the script should get one topic as an input - /scan and the script should publish three topics as follow = scan1, scan2, scan3

is there a way to split the laser scan and publish back and look them on rviz

I tried the following

def callback(laser):
    current_time = rospy.Time.now()
    regions["l_f_fork"] = laser.ranges[0:288]
    regions["l_f_s"] = laser.ranges[289:576]
    regions["stand"] = laser.ranges[576:864]
    l.header.stamp = current_time
    l.header.frame_id = 'laser'
    l.angle_min = 0
    l.angle_max = 1.57
    l.angle_increment =0
    l.time_increment = 0
    l.range_min = 0.0
    l.range_max = 100.0
    l.ranges = regions["l_f_fork"]
    l.intensities = [0]

    left_fork.publish(l)

    # l.ranges = regions["l_f_s"]
    # left_side.publish(l)

    # l.ranges = regions["stand"]
    # left_side.publish(l)

rospy.loginfo("publishing new info")

I can see the different topics on rviz, but they are lies on the same line,

roslidar