Clear Vector Time-Blocking Schedule Box Prompts for Stickers

Design a set of clean, high-contrast vector time-blocking schedule boxes for planner and journal stickers. Focus on precise line work, no shading or gradients, with a pure white background suited for die-cut stickers. Each prompt should include [Insert Time Block Label], [Start Time], and [End Time], ensuring easy customization for users. Maintain a consistent style across all variations, emphasizing readability and neatness.