A light flashes at position x$=0$mx$=0$m$.$ One microsecond later, a light flashes at position x$=1000$mx$=1000$m$.$ In a second reference frame, moving along the x$-$axis at speed vv$,$ the two flashes are simultaneous.

Part A

Is this second frame moving to the right or to the left relative to the original frame?

to the right $($in the positive xx$-$direction$)$to the left $($in the negative xx$-$direction$)$