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Obstacle Avoidance Robot

3.1 The obstacles will consist of rectangular wooden blocks painted with non-gloss white paint. The block can be of any height subject to a minimum of 50 mm. The length and width of the block shall be of a uniform cross-section, either 150 mm x 150 mm or 75 mm x 75 mm. The height is at least 50 mm. If a block is higher than 50 mm, then the horizontal cross-section of the block that is above 50mm can be of any shape provided no part of it extend beyond the base cross-section of 150 mm x 150 mm.