This interesting collection of conceptual art from Gürbüz Doğan Ekşioğlu involves abstract usage (and not usage at all) of a ladder.
Different images depict a sense of confusion for what the purpose of the ladder is (standing on top of many ladders trying to reach something, drawing pictures of ladders while stuck in a hole, etc.).
It’s a creative look at a sometimes very valuable tool as well as a playful look at the simple imagery of the ladder (ladder tree and ladder train tracks).
I would suggest taking a look at many more collections from Gürbüz Doğan Ekşioğlu.
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Brazilian Abstract Cartoons
Abstract Graphic Arts
Sound and Light Labyrinths