手动编程绘制图案的方法如下：
使用turtle库
创建画布和画笔：
```python
import turtle
screen = turtle.Screen()
pen = turtle.Turtle()
```
设置画笔速度和颜色：
```python
pen.speed(10)
pen.color("red")
```
绘制正方形：
```python
for i in range(4):
pen.forward(100)
pen.right(90)
turtle.done()
```
绘制五边形：
```python
pen.pencolor("blue")
pen.fillcolor("cyan")
pen.begin_fill()
for i in range(5):
pen.forward(150)
pen.right(72)
pen.end_fill()
```
绘制彩色小花：
```python
import random
colors = ["red", "orange", "yellow", "pink", "purple"]
for i in range(6):
pen.color(random.choice(colors))
for j in range(2):
pen.circle(50, 90)
pen.circle(25, 90)
pen.right(60)
pen.color("brown")
pen.dot(20)
```
使用循环和条件语句
绘制直角三角形：
```python
for i in range(1, 6):
print('*' * i)
```
打印直角三角形：
```python
def print_triangle(n):
for i in range(n):
for j in range(i + 1):
print("*", end="")
print()
print_triangle(5)
```
其他简单图案
绘制矩形：
```python
for i in range(4):
pen.forward(100)
pen.right(90)
pen.forward(100)
pen.right(90)
turtle.done()
```
绘制圆形：
```python
pen.circle(50)
```
绘制星形图案：
```python
for i in range(5):
pen.forward(100)
pen.right(144)
turtle.done()
```
通过上述方法，你可以使用turtle库轻松绘制各种简单的图案。根据你的需求，可以调整画笔的速度、颜色和移动距离，以创建出不同的图形。