import patterns;

size(0,400);
currentpen = 2+blue;
draw(unitcircle);
currentpen = 2+red;
label("{\Large Ball}", (0,-0.5));
draw(shift(2.0,2.0)*scale(1.5)*unitcircle);
label("{\Large Mitt}", (2.0, 1.0));
currentpen = black;

path ball = (0,0)--(0.707,0.707);
draw(ball,Arrow);
label("$\frac{ball\_size}{2.0}$", ball);

path mitt = (2.0,2.0)--(0.94,0.94);
draw(mitt, Arrow);
label("$\frac{mitt\_size}{2.0}$", mitt);

draw((-1,-1)--(-1,1)--(1,1)--(1,-1)--cycle,dashed);
draw((0.5,0.5)--(0.5,3.5)--(3.5,3.5)--(3.5,0.5)--cycle,dashed);

label("$(x,y)$",(-1,1), NW);
label("$(x+\frac{ball\_size}{2.0},y+\frac{ball\_size}{2.0})$", (0,0), S);

label("$(mittx, mitty)$", (0.5, 3.5), NW);
label("$(mittx+\frac{mitt\_size}{2.0},mitty+\frac{mitt\_size}{2.0})$", (2,2), N);