Make 2 trains pass through on 1 line. Blue train to right and yellow train to left.
There are 2 sidetracks. Only 1 train or carriage can enter in each sidetrack.
If 2 trains exist in the same sidetrack, you cannnot switch the crossing point.
You can move train engine by mousedrag. Only the engine can move a carriage.
you can switch the crossing point by click near the crossing point.
You can connect trains by draging near to the white link.
You can unconnect the trains by mouse click near the connective point, 'white link'.
You cannot make a link in front of engine train.