#171. Two variables

when green flag clicked
set [a v] to (12)
set [b v] to (31)
set [a v] to ((a) + (b))

# When the green flag is clicked
a = 12
b = 31
a = a + b

let a = 0, b = 0;

// When the green flag is clicked
a = 12;
b = 31;
a = a + b;

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