Botany

Design a clean, simple, and professional printable PDF revision tracker for four subjects: Botany, Physics, Chemistry, and Zoology. The tracker should visually organize revision schedules based on the 1-4-7-30 spaced repetition rule, clearly indicating topics to revise on the 4th and 7th days after initial study. Include easy-to-follow sections for each subject with date columns and checkboxes to mark completed revisions. Use minimalistic style with clear typography, soft pastel colors for subject differentiation, and a layout optimized for A4 printing. Ensure the design is user-friendly and helps users manage and remember their revision tasks effectively.