You can say if this is true, then go and do the following pieces of code or puzzle pieces that are inside this part of the block, else go ahead and do these that are down here.

你可以说如果条件成立，执行下面的代码段,或板块中的拼图，否则跳过去执行这下面的语句。

哈佛公开课 - 计算机科学课程节选

Another one might be "wait one second" which is another building block or puzzle piece and scratch.

另一条语句可能是“wait，one，second“,这条语句组成块或者片。

哈佛公开课 - 计算机科学课程节选