// For example:
coordinates_x = 1;
coordinates_y = 1;
x = eval ( "block_" +coordinates_x + "_" + coordinates_y );
var x = 0;
// So that there is the variable called block_1_1
with the value 0
// For example:
coordinates_x = 1;
coordinates_y = 1;
x = eval ( "block_" +coordinates_x + "_" + coordinates_y );
var x = 0;
// So that there is the variable called block_1_1
with the value 0