บทคัดย่อ, จิตรกรรม, แบบแผน, เส้นทแยงมุม, สีน้ำเงิน, สีเขียว, ความคิดสร้างสรรค์, สีน้ำ, สี, การวาดภาพ, พื้นหลัง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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