>>16689554
>wolframalpha.com won't draw [...]
nevermind

https://www.wolframalpha.com/input?i=Flatten%5B%7BAbs%5Bx+-+y%5D+%2B+Abs%5Bx+%2B+y%5D+%3D%3D+100%2C+Abs%5Bx+-+y%5D+%2B+Abs%5B0.5+x+-+y%5D+%3D%3D+25%2C+Table%5B%28x+-+8+k%29%5E2+%2B+%28y+-+6+k%29%5E2+%3D%3D+10%5E2%2C+%7Bk%2C+-5%2C+5%2C+2%7D%5D%2C+%28x+-+25%29%5E2+%2B+%28y+%2B+25%29%5E2+%3D%3D+25%5E2%2C+%28x+%2B+25%29%5E2+%2B+%28y+-+25%29%5E2+%3D%3D+25%5E2%7D%5D