  With the high spatial and temporal resolution H$\alpha$ images from the New
Vacuum Solar Telescope, we focus on two groups of loops with a X-shaped
configuration in the dynamic chromosphere. We find that the anti-directed loops
approach each other and reconnect continually. The connectivity of the loops is
changed and new loops are formed and stack together. The stacked loops are
sharply bent, implying that they are greatly impacted by the magnetic tension
force. When another more reconnection process takes place, one new loop is
formed and stacks with the previously formed ones. Meanwhile, the stacked loops
retract suddenly and move toward the balance position, performing an overshoot
movement, which led to an oscillation with an average period of about 45 s. The
oscillation of newly formed loops after magnetic reconnection in the
chromosphere is observed for the first time. We suggest that the stability of
the stacked loops is destroyed due to the join of the last new loop and then
suddenly retract under the effect of magnetic tension. Because of the
retraction, another lower loop is pushed outward and performs an oscillation
with the period of about 25 s. The different oscillation periods may be due to
their difference in three parameters, i.e., loop length, plasma density, and
magnetic field strength.
