Created
May 18, 2015 18:03
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| x = loc[1] | |
| y = loc[0] | |
| @image[y][x+1]=1 if x<(@image[y].length-1) | |
| @image[y][x-1]=1 if x>0 | |
| @image[y+1][x]=1 if y<(@image.length-1) | |
| @image[y-1][x]=1 if y>0 |
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