VX MELODY SKILL HELP

I'm using Yanfly's Melody battle engine, the active-time battle type so you can see how soon enemies/allies will be executing their actions on the time bar. I had an idea for a skill called "Gravity Sink" that would pull the enemy to the center of the bar (for example, if they were at 0%, the skill would pull them to 25%, but at 75%, it would pull them to 60%).

I know how to use conditionals in the noteboxes of my skills, but does some veteran Melody user know the script call for 1.) Fetching the target's current ATB % and 2.) Adjusting that % so it resets on the bar?

EDIT: I've been taking a few shots in the dark. Running "script: target.atb_speed = 50" as part of a skill's actions pushes the target to the very beginning of the ATB bar, but I've yet to figure out how to set it to specific points. Any ideas?