4 sentences

1. 五彩缤纷的旗帜在广场上空飞扬。

   wǔ​cǎi​bīn​fēn de qí​zhì zài guǎng​chǎng shàng​kōng fēi​yáng.

   Colorful flags were fluttering over the square.

   Source: Dong Chinese Dictionary

2. 节日里，天空中燃放起五彩缤纷的焰火。

   jié​rì lǐ, tiān​kōng zhōng rán​fàng qǐ wǔ​cǎi​bīn​fēn de yàn​huǒ.

   During the festival, colorful fireworks are set off in the sky.

   Source: Dong Chinese Dictionary

3. 潜水员在深海中发现了一大片五彩缤纷的珊瑚。

   qián​shuǐ​yuán zài shēn​hǎi zhōng fā​xiàn le yī dà​piàn wǔ​cǎi​bīn​fēn de shān​hú.

   Divers discovered a vast area of colorful coral in the deep sea.

   Source: Dong Chinese Dictionary

4. 在这个五彩缤纷的世界里，每个人都有自己的梦想。

   zài zhè​ge wǔ​cǎi​bīn​fēn de shì​jiè lǐ, měi gè rén dōu yǒu zì​jǐ de mèng​xiǎng.

   In this colorful world, everyone has their own dreams.

   Source: Dong Chinese Dictionary